Was there another update after I manually updated to 4.3? I did find my phone shut down the other morning. I also noticed a blue circle on the indicator icon bar (top, one the far left) with a two digit number that changes. I have come to believe that it is a battery charge indicator. No idea where it came from or when (it was not there last week).
It appears this update fixes the issue with third party chargers not charging the phone (at least the one that I have that wasn't working after the 4.3 update does now). Not sure what else might be in it.