I completely reset my phone after I noticed a couple of glitches related to booting the phone up.
Now my battery life is miniscule...seriously.
With Gingerbread, I usually could go for a bit over a day without a charge. This morning I was off the charger for maybe 4 hours and the phone signaled me that it was at 14% and that was with NO use.
So I recharged it at work with a USB cable to 70%. In about 2 hours it was back down to 14%.
That's with a nonanimated wallpaper and no apps open or multitasking except for a clock/weather widget ("Beautiful Widgets")
Just now when it discharged again, I noticed the phone was warm in my pocket, but the screen was not on.
I'm planning on resetting it again tonight and not put any apps on it except for the essentials.
Naturally I am very disappointed with this situation. It's very similar to what happened to my Transformer tablet with the ICS "upgrade". One might guess that there is a major problem with ICS.