Yesterday my device updated it software to the new 3.9 version. Unfortunately the problems remain. Battery works fine with GPS lasting more than 7 hours but in the stand by mode it last up to a day.
Floors climbed didnt work either.
This is the same problem that caused me to send my Garmin back to the factory the first time, and though they fixed it that time, I'm not going to bother this time. Too many other problems (mostly user interface issues, but also functional), so I'll just jump to the conclusion and say "No more Garmin for me."