I have just noticed that the dates of my last few activities are wrong in Garmin Connect.
When I looked at my calendar it was showing both Saturday and Sunday as being September 24. All dates after that were 1 day out (i.e. Monday should be Sept 26, but on my calendar is Sept 25).
Saturday 24th was also the day we went to daylight savings time, so that might be part of the problem or just a strange coincidence. This appears to be a GC problem, as the dates are correct on my watch, in Training Center and on Sports Tracks.
Has anyone else noticed this problem, or is it just me?