http://www.garmin.com/support/agree.jsp?id=1245
Changes made from version 2.60 to 2.70:
Improve path nighttime color for map Topo Great Britain v2.
Enhance layout and functionality of tide station chart information.
Add new time zones for major cities in the U.S. and Europe.
Improve By-Name city search to use all available maps.
Improve layout of airport information display.
Improve reset function of timer lap distance.
Improve route calculation performance by setting recalculation distance farther ahead.
Fix issue where extremely high or low altitude readings could occur when baro auto-calibration was enabled.
Prevent Poor Satellite Reception popup from repeatedly occurring when GPS is off.
Add GPRMB sentence to the NMEA output.
Improve stability when using Lithium Ion Battery.
Fix track log time stamps.
Improve Custom POI banner display on map preview page.
Fix issue where total ascent and total descent were incorrectly computed.
GPS76Cx ist auch frei gegeben...http://www.garmin.com/support/agree.jsp?id=1249