Garmin Oregon 200, 300, 400i, 400c, 400t Software Summary

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There has never been an issue with loading the software image for one x00 model of Oregon onto a different x00 model. The software images for the 200, 300, 400i, 400t and 400c have been identical. The software images for the x50 Oregon (550 and 550t) are different from the x00 images. The history of these images can be found on the x50 Firmware page.

Garmin Store Updates and Download pages

Garmin Oregon 200
Garmin Oregon 300
Garmin Oregon 400c
Garmin Oregon 400i
Garmin Oregon 400t

Garmin Support Updates and Download pages (Webupdater only)

Garmin Oregon 400t

GCD based upgrades

Some software releases below are linked directly to a GCD file for that release.

Each Software Version below is linked to that version's gcd file. Normally I would recommend upgrading through Webupdater but if for some reason you can't (e.g. you are trying to downgrade) then you can update using the following procedure:

• Use the links below under "Software Version" to download the gcd file for the version you want to use
• Change the name of the file you just download to gupdate.gcd
• Attach the Oregon to your computer and verify that it is in USB Mass storage mode
• Copy gupdate.gcd to [OR drive]:\Garmin\gupdate.gcd
• Restart the Oregon

Software Version	GPS Software Version	Date	Wherigo Player	Comments
4.20	5.00	05/18/11	Player: v.4.20 Engine: v.2.11	Bugfixes and improvements
4.17 (beta)	5.00	04/08/11	Player: v.4.12 Engine:v.2.11	Fixes for issues introduced with 4.16 beta
4.16 (beta)	5.00	03/16/11	Player: v.4.12 Engine: v.2.11	Some bugfixes and improvements
4.12 (beta)	5.00	12/22/10	Player: v.4.12 Engine: v.2.11	Even more bugfixes
4.11 (beta)	5.00	12/18/10	Player: v.4.12 Engine: v.2.11	Bugfixes
4.10	4.52	10/15/10	Player: v.4.10 Engine: v.2.11	Chirp(TM) support, custom maps bug fix
4.00	4.52	09/23/10	Player: v.4.00 Engine: v.2.11	Fixes for trip odometer distance calculation, minor bug fixes
3.90	4.52	09/03/10	Player: v.3.90 Engine: v.2.11	Official release of beta 3.81 to 3.85
3.85 (beta)	4.52	08/11/10	Player: v.3.85 Engine: v.2.11	Added Geocache multicache support
3.82 (beta)	4.46	06/04/10	Player: v.3.82 Engine: v.2.11	Added Geocache filtering, Fixed issue syncing with BaseCamp.
3.81 (beta)	4.46	05/28/10	Player: v.3.80 Engine: v.2.11	WAAS improvements, BirdsEye brightness control, Low speed data field improvements
3.80	4.34	04/12/10	Player: v.3.80 Engine: v.2.11	Bugfixes
3.70	4.34	03/29/10	Player: v.3.70 Engine: v.2.11	Support for custom symbols and Garmin BirdsEye added
3.60	3.70	01/29/10	Player: v.3.6 Engine: v.2.11	Bugfixes
3.50	3.70	01/13/10	Player: v.3.5 Engine: v.2.11	Added Elevation profile of upcoming route Added new dashboards options (compass, elevation,...)
3.42 (beta)	3.70	12/22/09	Player: v.3.42 Engine: v.2.11
3.41 (beta)	3.70	12/08/09	Player: v.3.41 Engine: v.2.11
3.40	3.70	11/25/09	Player: v.3.40 Engine: v.2.11	Added profile support for Garmin Custom Maps Fixed lockup while using GB Discoverer maps
3.30	3.70	11/17/09	Player: v.3.30 Engine: v.2.11	Improved along road routing performance
3.22 (beta)	3.70	10/8/09	Player v.3.22 Engine v.2.11	Added Garmin Custom Map support
3.20	3.70	9/2/09	Player v.3.20 Engine v.2.11	Official release of 3.15 beta.
3.15 (beta)	3.70	8/18/09	Player v.3.15 Engine v.2.11	Fixes shutdown introduced in 3.12 (possibly 3.10).
3.13 (beta)	3.70	8/7/09	Player v.3.13 Engine v.2.11	Fixes issues introduced in 3.12
3.12 (beta)	3.70	7/31/09	Player: v.3.12 Engine: v.2.11	New GPS firmware to improve accuracy at slow speeds under cover.
3.10	3.40	7/29/09	Player: v.3.10 Engine: v.2.11	First non-beta release since 12/08. Very similar to 3.01b, rolls up all beta features and fixes.
3.01 (beta)	3.40	7/01/09	Player: v.3.01 Engine: v.2.11	Fix shutdown crash
2.99 (beta)	3.40	6/22/09	Player: v.2.99 Engine: v.2.11	Adds multi .img support, but has shutdown crash
2.98 (beta)	3.40	5/15/09	Player: v.2.98 Engine: v.2.11	Resolved GPS receiver issue
2.97 (beta)	2.80	4/30/09	Player: v.2.97 Engine: v.2.11	Resolved several bugs in 2.96
2.96 (beta)	2.80	4/25/09	Player: v.2.96 Engine: v.2.11	Added Waypoint Averaging, Sight' N Go, MOB
2.95 (beta)	2.80	4/1/09	Player: v.2.95 Engine: v.2.11	Odometer gets big data fields and new dashboards
2.94 (beta)	2.80	3/25/09	Player: v.2.94 Engine: v.2.11	Adds waypoint editing from waypoint page, multi-point map picker
2.93 (beta)	2.70	3/10/09	Player: v.2.93 Engine: v.2.11	Improved GPS reception and Spanner enhancements
2.90	2.58			Release only available on new handhelds similar to 2.85/2.86
2.86 (beta)	2.63	2/3/09	Player: v.2.86 Engine: v.2.11	Minor fixes and clean up after 2.85, big issues with GPS accuracy
2.85 (beta)	2.58	01/21/09	Player: v.2.85 Engine: v.2.11	Fixes issues in 2.7/2.8, Custom POI database support, battery meter
2.80	2.58	12/12/08	Player: v.2.80 Engine: v.2.11	Fixes issues introduced in 2.7
2.70	2.58	12/08/08	Player: v.2.70 Engine: v.2.11	Added GB Discoverer support, marine enhancements, battery saver
2.60	2.55	10/22/08	Player: v.2.60 Engine: v.2.11	Fixes for crashes and freezes at startup
2.50	2.48	9/12/08	Player: v.2.50 Engine: v.2.11	Fixes issues introduced in 2.4
2.40	2.48	9/4/08	Player: v.2.40 Engine: v.2.11
2.30	2.48	8/20/08	Player: v.2.30 Engine: v.2.11
2.20	2.42	7/02/08	Player: v.2.20 Engine: v.2.11	Released prior to product launch. Available only via Webupdater on Support page.
2.10	2.42	7/08		Provided on 400t at product launch

To determine your current installed Software and GPS Software Versions go to Main Menu->Setup->About... You should see a screen that looks like this which will display both your Software and GPS Software version number.



The Wherigo Player versions are available by selecting Main Menu->Wherigo and pressing the button at the bottom of the screen.

Garmin Computer Software

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Garmin also provides several software programs and utilities for the PC and Mac which are of interest to Garmin Oregon users.

PC Software

Garmin USB Driver: 2.3
Communicator: 2.8.1
Mapsource: 6.15.11 (note: 6.13.7 may be more stable)
MapInstall: 3.12.1
POI Loader: 2.5.4
Webupdater: 2.4.2
Spanner: 2.1
BaseCamp: 3.0.1
nRoute (no longer officially supported): 2.7.6

Mac Software

Communicator : 2.9.1
MapInstall: 2.1.0
MapConverter (for Windows) : 2.0.1.0
RoadTrip: 2.0.2
POI Loader: 2.1.0
Webupdater: 2.0.6
BaseCamp: 3.0.1

Detailed Version History

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Software 4.20

• Updated magnetic Earth data
• Improved GPS performance
• Improved support for BirdsEye™ Satellite Imagery (each provider's imagery can be configured independently)
• Increased the maximum number of supported JNX files to 250 from 200
• Fixed issues with WAAS/EGNOS
• Fixed issue with track navigation sometimes not adding waypoints to the Active Route list
• Fixed issue with MPC map labels disappearing
• Fixed shutdown on the map page when you have a geocache dashboard active and return after pressing the geocache name
• Fixed issue with photo viewer not displaying correctly
• Fixed issue with 3D view
• Fixed issue with track navigation not adding waypoints to the Active Route list when they are exactly equal to a track point
• Fixed shutdown when the device had more than the maximum number of JNX files on it
• Fixed shutdown related to topographical maps and land cover text size
• Fixed shutdown associated with certain custom POI files
• Fixed Glide Ratio to Destination field
• Fixed an issue related to adding a geocache as a point in a route
• Fixed an issue with magnetic north reference and waypoint headings
• Modified the 'Arriving at Destination' message banner so that it no longer appears when navigating to a geocache

Software 4.17 (beta)

• Fixed shutdown when selecting an option on the 'Where To?' page that was introduced with 4.16 beta
• Fixed ANT connectivity issues that were introduced with 4.16 beta
• Fixed the slow rendering time of the 'About' page that was introduced with 4.16 beta
• Fixed a bug introduced in 4.16 beta where JNX settings were not being saved for each profile
• Fixed an issue with magnetic north reference and waypoint headings

Software 4.16 (beta)

• Improved GPS performance
• Improved JNX file handling
• Improved the usability of the main menu setup page
• Increased maximum number of supported JNX files to 250 from 200
• Fixed shutdown when unit had more than the maximum number of JNX files on it
• Fixed shutdown related to topographical maps and land cover text size
• Fixed shutdown associated with certain custom POI files
• Fixed Glide Ratio to Destination field
• Fixed an issue related to adding a geocache as a point in a route

Software 4.12 (beta)

• Fixed issues with WAAAS/EGNOS
• Fixed issue with photo viewer not displaying correctly
• Fixed issue with 3D view
• Fixed issue with track navigation not adding waypoints to the Active Route list when they are exactly equal to a track point

Software 4.11 (beta)

• Updated magnetic Earth field data
• Improved GPS performance
• Fixed issue with track navigation sometimes not adding waypoints to the Active Route list
• Fixed issue with MPC map labels disappearing
• Fixed shutdown on the map page when you have a geocache dashboard active and return after pressing the geocache name

Software 4.10

• Added support for Chirp™ (Oregon 300, Oregon 400).
• Fixed problem with certain custom maps.

Software 4.00

• Fixed issue on 3D View where vehicle could move after using the map.
• Fixed issue on map page where back button would jump to the main menu.
• Fixed issues with odometer distance.
• Fixed shutdown while panning the map for extended periods of time.

Software 3.90

• Added ability to set user declination direction
• Added Automatic Shaded Relief option
• Added brightness adjustments for BirdsEye imagery
• Added Geocache filtering. Select Setup > Geocaches to add custom filters
• Added multicaching support
• Improved WAAS performance
• Fixed elevation profiles to always use the most detailed DEM data loaded
• Fixed issue with calculator % function
• Fixed issue with map POI's showing twice for a single point
• Fixed issue with Oblique Mercator User grid
• Fixed occasional shutdowns
• Fixed spot sounding display on certain maps

Software 3.85 (beta)

• Added multicaching support.
• Added Automatic Shaded Relief option.
• Added ability to set user declination direction.
• Improved accuracy of trip odometer.
• Fixed occasional shutdowns.
• Fixed issue with Oblique Mercator User grid.

Software 3.82 (beta)

• Added Geocache filtering. Select Setup > Geocaches to add custom filters.
• Fixed issue syncing with BaseCamp.

Software 3.81 (beta)

• Added brightness adjustments for BirdsEye imagery.
• Improved WAAS performance.
• Improved speed, trip odometer, and stopped/moving time data fields while in low velocity.
• Fixed issue with map POI's showing twice for a single point.
• Fixed elevation profiles to always use the most detailed DEM data loaded.
• Fixed issue with calculator % function.

Software 3.80

• Added BirdsEye control to profiles.
• Added screen calibration option to Oregon 200.
• Fixed issue changing marine modes.
• Fixed map display problems.

Software 3.70

• Added support for Garmin BirdsEye .
• Added mmHg pressure units.
• Added ability to change active track color.
• Added option to calibrate screen under Setup->Display.
• Added custom waypoint symbol and geocache symbol support.(Seems to be wrong information that this feature is included in software 3.70. According to Garmin tech support there are currently no plans to add this feature to the x00 units)
• Corrected issue with GPS acquisition on certain units.

Software 3.60

• Increased the map drawing range to allow maps to draw farther south.
• Corrected issue with route line sometimes not drawing.
• Corrected issues with marine POI.
• Corrected issues with GB Discoverer maps.
• Corrected issue with project waypoint bearing sometimes not showing the input value.

Software 3.50

• Added ability to view elevation plot of upcoming active route or currently navigated track in blue.
• Added display of icons to the lists in Where To? > Waypoints and the Geocaching application.
• Added phone numbers when available to POI review pages.
• Added Compass, Stopwatch, Active Geocache, and Elevation Plot dashboard options.
• Introduced dashboard options to the Compass and Map pages.
• Improved track navigation. Visit https://garmin.blogs.com/softwareupdates/trail-tech/ for more information.

Software 3.42 (beta)

• Added date/time to Elevation Plot page when plot future is active.
• Added display of icons to the lists in Where To? > Waypoints and the Geocaching application.
• Fixed issue where vehicle position would switch between actual and on-road locations.
• Fixed issue where searching for a geocache from the Geocaching-Active * widget would return to the map page without ever giving the option to navigate to the geocache.

Software 3.41 (beta)

• Added ability to view elevation plot of upcoming active route or currently navigated track in blue.
• Added Compass, Stopwatch, Active Geocache, and Elevation Plot dashboard options.
• Introduced dashboard options to the Compass and Map pages.
• Improved track navigation. Visit https://garmin.blogs.com/softwareupdates/trail-tech/ for more information.

Software 3.40

• Added profile support for Garmin Custom Maps
• Fixed lockup while using GB Discoverer maps

Software 3.30

• Added support for Garmin Custom Maps
• Improved along road routing performance

Software 3.22 (beta)

• Added support for Garmin Custom Maps. See our blog post about this new feature at
  https://garmin.blogs.com/softwareupdates/trail-tech/.

Software 3.2

• Added LKS92 map datum
• Added support for GPS firmware 3.70
• Added support for GPI routes
• Improved compass responsiveness
• Fixed potential shutdown related to drawing 32-bit map points
• Fixed potential issues during power on.

Software 3.15 (beta)
Recommended. GPS Firmware update introduced in 3.12 has been very accurate and tracklogs are much less noisy. Issues introduced in 3.12 and 3.13 have been fixed in this release which has been very stable.

• Added LKS92 map datum
• Fixed potential shutdown with custom POIs with custom symbols
• Fixed issues with routing avoidances

Software 3.13 (beta)
Operation with compass has improved but still see shutoffs in automotive mode, particularly when displaying and navigating to custom POIs.

• Fixed issues with thresholds used for auto compass switching.
• Fixed issues with back button not appearing when editing a waypoint.

Software 3.12 (beta)
GPS Firmware changes to 3.70.

• Improved GPS performance
• Expanded support for custom POIs

Software 3.10
This release is very similar to 3.01 beta although there are three items included in Garmin's release notes for 3.10 that have not shown up in any prior beta:

• Improved automatic route recalculation
• Improved compass responsiveness in challenging GPS environment
• Improved Spanish keyboard

Garmin has also indicated that 3.01 and 3.10 are similar but not identical, citing differences in how GB Discoverer works with multiple map .img files. The complete list of release notes from Garmin is below.

• Added Waypoint Averaging application (For more information visit our new Trail Tech website at https://garmin.blogs.com/softwareupdates/trail-tech/)
• Added Sight 'N Go application for the Oregon 300/400i/400c/400t
• Added Man Overboard application
• Added big numbers option to the trip computer
• Added customizable text to unit power-on screen (see \Garmin\startup.txt)
• Added ability to load maps from any img file in the Garmin directory
• Added new trip computer dashboards
• Added option to display four configurable data fields on the map
• Added 'search near' option to Geocaches search
• Added the ability to view geocache logs separate from the description
• Added ability to see a list of points from the map when several points are at the same location
• Added ability to edit a waypoint from the waypoint review
• Added support for Custom POI database and category selection
• Added distance and bearing to point when reviewing a Custom POI
• Added POI subcategories
• Added change location to Sun and Moon
• Added change location to Hunt and Fish
• Added ability to force the Oregon into mass storage mode by holding the power button for 30 seconds while plugged into a USB cable
• Added NMEA 9600 baud
• Improved render quality of GB Discoverer maps and maps with satellite imagery
• Improved map zooming
• Improved map draw speed
• Improved map panning and zooming when shaded relief is turned on
• Improved automatic route recalculation
• Improved Custom POI spell search
• Improved Main Menu setup and added option to add and remove items
• Improved readability of configurable data fields
• Improved display of numeric degrees and mils
• Improved GPS performance at slow speeds in tree cover
• Improved compass responsiveness in challenging GPS environments
• Improved battery gage for NiMH batteries
• Improved stability when changing profiles
• Improved Wherigo stability
• Improved connection reliability with Spanner
• Improved Spanish keyboard
• Fixed airport points not displaying on the map
• Fixed lockup when a search returns no results
• Fixed elevation errors when reviewing a point other than a waypoint
• Increased the number of waypoints viewable from the Waypoint Manager and Where To?>Waypoints

Software 3.01 (beta)
Recommended. This software appears to be stable and the power off issues from 2.99 are fixed . There were some initial reports of people who had problems with certain types of SD cards that were not formatted in FAT32 mode. I also think that some issues may arise when upgrading to 2.99 or 3.01 because people may have additional maps on their units which suddenly become active because of the "any name" map image file support. Before upgrading I would recommend two things

1. Remove the SD Card
2. Review and remove any .img files from your \Garmin directory that you don't want to be active. Any file with a .img extension will become an active map with this new software.

After the upgrade reinsert the SD card and verify that the \Garmin directory on the SD card also has only the .img files you want to be active and verify that it is formated as a FAT32 filesystem.

Garmin's release note.

• Fixed improper shutdown

Software 2.99 (beta)
Not Recommended. The ability to have multiple map files on the unit is a great new feature, but unfortunately this release suffers from a crash when the unit is powered off. This crash seems to prevent some (most?) configuration changes from being saved across reboots. Given that there might be profile file corruption involved and I've heard of several of cases where people have bricked their units, I strongly recommend not upgrading to this release.

• Added ability to load maps from any img file in the Garmin directory
• Improved display of numeric degrees and mills
• Improved Wherigo stability
• Fixed elevation errors when reviewing a point other than a waypoint

Software 2.98 (beta)
Recommended. This is a stable release as the major issue associated with not locking satellites has been addressed by Garmin, but receiver accuracy issues still persist under tree cover and WAAS is not functional under tree cover. These lingering issues around GPS receiver performance are similar (maybe slightly better) than before the beta period started (i.e 2.8). As such I would recommend this beta to take advantage of the new features introduced during the beta period but do not expect significantly better GPS receiver performance.

• Fixed not acquiring signal from all satellites in view
• Changed EPE to be more dynamic in changing conditions

Software 2.97 (beta)

• Fixed lockup when a search returns no results
• Fixed map stopped drawing while autorouting

Software 2.96 (beta)
Not recommended. There have been a number of stability issues in this release including:

• Map page will freeze and display all white while autorouting in City Navigator. Power cycle (sometimes battery pull) required.
• POI searches using spell search "ABC" frequently hang (spinning hourglass). Battery pull required.
• All installed maps become enabled in a profile.
• Switches between profiles sometimes appear hung (spinning hourglass) but actually happen.

Same GPS software (2.80) as 2.94 and 2.95 so don't expect much improvement in WAAS or GPS accuracy for this release.

New features are documented on GPSFix.

• Added Waypoint Averaging application. (For more information visit our new Trail Tech website at https://garmin.blogs.com/softwareupdates/trail-tech/)
• Added Sight 'N Go application for the Oregon 300/400i/400c/400t.
• Added option to display four configurable data fields on the map.
• Added customizable text to unit power-on screen (see \Garmin\startup.txt)
• Added Man Overboard application
• Added the ability to view geocache logs separate from the description
• Increased the number of waypoints viewable from the Waypoint Manager and Where To?>Waypoints

Software 2.95 (beta)
Recommended, with cavets. Fixes map crash in 2.94, but GPS accuracy in this release and the previous 2.94 release is not as good as 2.93. Many users experienced significant GPS outages with this release which went away after several days. New features work well, so it will come down whether to can you live with less than perfect GPS accuracy to get access to the new features.

• Added big numbers option to the trip computer
• Added new trip computer dashboards
• Added POI subcategories
• Added 'search near' option to Geocaches search
• Added change location to Sun and Moon
• Added change location to Hunt and Fish
• Fixed shutdown on the map

Software 2.94 (beta)
Recommend, with caveats. The major issues with 2.93 seem to have been addressed (battery management and random shutdowns), but a new issue has come up which causes the unit to shutoff in automotive mode when exiting the map page. If you are on 2.93 my feeling is that it is worth upgrading. 2.85 is still the most stable and reliable release. GPS performance in this release seem to be similar to 2.93.

• Added ability to see a list of points from the map when several points are at the same location
• Added ability to edit a waypoint from the waypoint review
• Improved render quality of GB Discoverer maps and maps with satellite imagery
• Improved Main Menu setup and added option to add and remove items.
• Improved readability of configurable data fields
• Fixed increased battery consumption and shutdowns in some units

Software 2.93 (beta)
Recommended, with caveats. The GPS reception improvements in this release seem real. The GPS is more responsive and the unit tracks well at slows speeds under cover. The issues with 2.86 seem to have been addressed. Tracklogs, however, have a lot of noise and are about 10-20% longer than they should be. Several issues with Custom POIs have been addressed and Garmin has improved Spanner support to include A301 for direct tracklog transfer using NMEA (PDF). The downside of this release is that some users are reporting decreased battery life and random power downs. It only seems to affect some Oregons and it is a very intermittent issue for people who are seeing it.

• Improved GPS reception
• Improved connection reliability with Spanner
• Fixed GB Discoverer map not displaying while zooming (introduced in 2.86 beta)
• Fixed roads not showing on maps with satellite imagery (introduced in 2.86 beta)
• Fixed map with no DEM data drawing with a gray background (introduced in 2.86 beta)

Software 2.86 (beta)
Not recommended. Reported "GPS Accuracy" is smaller (i.e. better) in this release however track comparisons between this 2.86 and 2.85 or other GPS's seem to indicate a lot of track variability especially under tree cover. Unit feels much less averaged in this release but to an extent where you can swings on the map and compass page during navigation. Panning on the map page which runs into the zoom control results in a partially drawn map.

• Added distance and bearing to point when reviewing a Custom POI
• Improved map panning and zooming when shaded relief is turned on
• Improved GPS performance at slow speeds in tree cover
• Improved Custom POI database organization
• Improved Custom POI spell search
• Fixed possible shutdown when reviewing a Tide or Current Point using Where To?
• Fixed possible shutdown when searching for an address and selecting Search All cities

Software 2.90
Recommended. Not available for download, Garmin provided this release on new units only but it appears to be very similar if not identical to beta 2.85.
Software 2.85 (beta)
Recommended. This "beta" version of Oregon software seems to be as stable or better than both 2.8 and 2.7. As such, I think it is worth taking if you are having the problems described below in 2.8 with profile changes or if you are a GB Discoverer user. If you are not having issues and aren't dying to get custom POI support or the battery meter improvements with this release I would hang tight until Garmin releases the non-beta version which I'm guessing will be shortly.

The only issues I've experienced or read about include:

• Loading a single custom POI database does not work properly
• Potential slower response time from the touchscreen immediately after changing pages, this is most evident on the Alarm Clock page

This beta release addresses issues introduced in 2.8 around the stability of profile changes. Battery gauge is more accurate with NiMH batteries and map redrawing has changed, although I don't believe it is significantly faster. Users report improvements with GB Discoverer, autorouting roads are no longer shown on top of raster maps and raster maps are easier to read. Custom POI database and category selection works although built in map POIs still do not display categories.

• Added support for Custom POI database and category selection
• Added ability to force the Oregon into mass storage mode by holding the power button for 30 seconds while plugged into a USB cable
• Added NMEA 9600 baud
• Improved map zooming
• Improved raster map appearance
• Improved map draw speed
• Improved battery gauge for NiMH batteries
• Improved stability when changing profiles
• Fixed roads being shown on top of Garmin GB Discoverer maps
• Fixed airport points not displaying on the map
• Fixed some scan points not working properly with Garmin GB Discoverer maps
• Fixed track logging setting being changed when changing profiles while simulating GPS

Software 2.8
Not Recommended
Several new issues related to settings and profile configurations not working or being lost have been introduced:

• Map orientation in automotive profile is sometimes set to North/Track Up instead of Automotive
• Background image settings are not working properly (Default background image displays sometimes even though it is not selected)
• Map enable/disable settings are getting corrupted in the profile file, requiring the profile file to be removed and recreated

Some of the issues above may be related to a power off crash that can be caused by switching from Geocaching to Automotive profile with an active route. The steps to reproduce the problem are detailed here and in the issues list.
Introduced only 3-4 days after 2.7 to fix new issues introduced in this release.

• Fixed 3D view not displaying
• Fixed shaded relief being set to 'Do Not Show'
• Added setting to change land cover text size

Software 2.7
Not Recommended (see 2.8)
New bugs introduced in this release: 3D View does not work, relief shading always defaults to "Do not Show" even if set to "Show if Available" after power cycling. Some reported issues with the altimeter page not displaying data, although make sure the Track Log is set to one of the "Record" modes.

• Added support for Garmin GB Discoverer maps
• Added ability to view marine chart notes for marine points
• Added ability to change the date for the tide and currents charts
• Added a display option in the setup menu to save battery power
• Fixed shutdown that can occur when you enter coordinates in demo mode
• Fixed a potential shutdown that can occur when panning the map that is showing satellite imagery
• Improved GPS accuracy when using WAAS

Software 2.6
Many users are reporting success with this upgrade. It does introduce a couple of new issues: some configuration options are not saved in the profile and there is a crash when entering coordinates in Demo mode. But the big fix is the first item which has been getting in the way of many users -- the startup crash and freeze. Connection times in mass storage mode are much faster as well.

• Fixed issue that caused a shutdown during power on
• Added support for marine fishing, nautical, and off modes
• Added tide and current charts
• Added ability to access marine point information on the review page
• Made marine POIs available when panning the map
• Fixed issue when marking waypoints in the W Malayan RSO position format.
• Added GDA 94 datum.
• Added NAD 83 datum.
• Improved user interface for waypoint location editing
• Added 'Coordinates' option to the 'Where To?' menu
• Improved position accuracy calculation
• Improved static position accuracy

Software 2.5
This drop appears to fix issues created in Software 2.4 but a lot of people are reporting hangs and freezes after upgrading. These new issues seem happen in the the same places where the out of memory problems were occurring in 2.3. Unless the memory full errors in 2.3 are driving you crazy I would postpone upgrading until Garmin works this out. If you do decide to upgrade I would suggest backing up and removing all gpx files from the unit and performing a master reset before the upgrade to avoid problems during the upgrade. Once you are upgraded if you have problems with a frozen unit that won't boot you'll need to first try a master reset and if that doesn't work a recovery.

• Fixed issue with barometric pressure.
• Fixed issue with tide station data.
• Fixed issue with elevation over time plot.

Software 2.4
Unless you need a fix for the Memory Full problem this software is not recommended. Version 2.4 was released to fix the Memory Full issues that many Oregon users were seeing. However, this version has broken:

• Barometric pressure data field and plot no longer show data unless you recalibrate every time you power cycle.
• Tide data is no longer visible under each tide station.
• Some users have reported issues after upgrading to 2.4 with freezes at "Loading Maps..."
• USB connection freezes seem to be back after going away in 2.3.

List of issues resolved:

• Improved accuracy of altimeter for large altitude changes.
• Improved importing geocaches. When the same geocaches is in multiple files, the geocaches from the newer file (file modified time) will be imported.
• Fixed text writing on top of itself in some geocaches descriptions.
• Fixed freeze when loading some geocaches descriptions.
• Fixed issues causing a 'Memory Full' warning message.
• Fixed issues with power off pressure trending.
• Fixed issue with duplicate waypoint names.

Software 2.3
Given the number of issues resolved and relative stability of the release 2.3 is a recommended update. The only major issues which seem to persist in 2.3 are the Memory Full problems and WAAS is still broken. There was one minor issue introduced in 2.3 related to viewing the elevation plot of a route.

• Added the ability to control the scale of the x and y axes of elevation plot . Tap the x-axis legend to zoom the x-axis. Tap the y-axis legend to zoom the y-axis
• Added panning and zooming to the image viewer
• Added ability to set position after pressing the go button when GPS is in Demo Mode
• Added option to add a point from the map in Route Planner
• Added option to search near a point on the map in Where To?
• Added preview of on-road routes in Route Planner
• Added option to save a geocaches as a waypoint
• Added error message when the maximum number of geocaches is exceeded (2000)
• Added error message when the maximum number of gpx files is exceeded (200)
• Added option to clear the current track from Track Manager
• Added support for downloading geocaches written using Groundspeak v1.1 extensions
• Added elevation plot type to user profiles
• Improved GPS performance
• Improved map drawing performance in some situations
• Improved handling of naming a waypoint the same as an existing waypoint
• Improved feedback when typing an invalid character into the keyboard
• Improved display of intermittent water areas
• Fixed 3D View not showing detail from supplemental maps
• Fixed 3D View occasionally not showing anything
• Fixed waypoint and geocache symbols not updating on the map after being changed
• Fixed Custom POIs not being removed from Recent Finds after the Custom POI database was deleted
• Fixed being unable to pan or zoom when reviewing a route
• Fixed issues with Cyrillic characters
• Fixed issue where the Oregon would temporally stop responding after a spell search
• Fixed issue where left map data field could get stuck on depth
• Fixed creating invalid gpx files after projecting a waypoint
• Fixed city coloring with CityNav 2009
• Fixed map getting stuck in north up mode after panning
• Fixed geocaches without names not being in the geocaches list

Software 2.2
Software 2.2 was released prior to the 400t product launch and is a recommended upgrade for the Oregon.
Changes made from version 2.10 to 2.20:

• Added support for customizing track colors.
• Added support for custom POI alarms.
• Improved track archiving.
• Enabled map drawing above 75 degrees latitude.
• Reduced boot time.
• Added DEM shading setting to user profile.
• Added alarm tone that cannot be turned off.
• Improved high detail map drawing.

Software 2.1
Initial product release on Garmin 400t. No release notes available. Since 2.2 was available when the 400t shipped this release was never really used.