I tried 3.1 today on an unusually warm December day. For the first time, I had complete success. It locked with my HR belt and GSC-10 (Tempe was left at home), it locked with GPS, didn't lose any video or GPS/ANT+ data. (On Friday, under 3.0, it failed to acquire the GPS satellites, so I had a track of HR and cadence, and nothing else.) I'm considering replacing the track with the one from my Edge 800 only because the barometric-altimeter-that-can't-be-calibrated started 200 ft low, although it drifted so at the end it was only 50 ft off. Incidentally, when I uploaded the track (using the .fit file) briefly to Garmin Connect, it showed me running cadence rather than cycling cadence for some reason. VIRB Edit is showing the cadence correctly.
