It happens to me sometimes.
2.1 never gave me any problems. I'm running dead stock with very few apps and now that 2.2 is here at least once a day I have to do a battery pull because of the phone freeze ups.
Well I have spent the day reading up to page 43, and I mean every single post. I have seen some stuff to try, like I redid my update from the SDcard and some things seem ok now. I do have my phone trying to charge right now, and on this last 10%, my charge is going back and forth occasionally and will not finish unless I touch it. I think it did this last night too, cause this morning it was blinking red and died. I have lag, and this update has nice features, but I miss the stability. Anyone else having a charge issue like mine?
Lithium Ion/Polymer batteries have a tremendous energy storage capacity for their size/weight, but they're far from durable.