Took a while, ahem, but:
https://buy.garmin.com/...tore/fr310update.jsp
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Changes made from version 2.90 to 3.00:
-Implemented support for speed zones. The user cannot view or edit on the device, but speed zones can be sent from Garmin Training Center or Garmin Connect and then used in workouts.
-Fixed various issues with workouts showing wrong units in steps.
-Added new data fields: Vertical Speed - 30 second average, 3 second power, 30 second power, %FTP power and max speed.
-Fixed issue with GPS taking precedence over GSC10 for speed/distance even indoors
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Props to rkalish for the catch:
http://forum.slowtwitch.com/gforum.cgi?post=3085154
https://buy.garmin.com/...tore/fr310update.jsp
----
Changes made from version 2.90 to 3.00:
-Implemented support for speed zones. The user cannot view or edit on the device, but speed zones can be sent from Garmin Training Center or Garmin Connect and then used in workouts.
-Fixed various issues with workouts showing wrong units in steps.
-Added new data fields: Vertical Speed - 30 second average, 3 second power, 30 second power, %FTP power and max speed.
-Fixed issue with GPS taking precedence over GSC10 for speed/distance even indoors
----
Props to rkalish for the catch:
http://forum.slowtwitch.com/gforum.cgi?post=3085154