Since I've updated to 3.1 I haven't had any problems until this past weekend. My 3gs just ahuts itself off & the battery on it is reallly bad compared to 3.0.1. I have to softreboot my 3gs to turn it on!!! I haven't restored my 3gs yet but I will do it right away to see if that fixes my battery and shutting off issue. Has this happen to anyones 3gs????? (besides the bettery issue)