| | Re: Latest OS 9930 126.96.36.1997 / 188.8.131.520 (Multilanguage)
battery performance for me never seems to change based on OS version. (I have had horrible battery performance after installing some apps though, so I promptly remove them.)
Only glitch I have seen is that my main messages icon shows a star sometimes even though there are no unread messages. And, probably related, when I view things like the calendar it will show a starred envelope in the top status area (again no new messages). ( don't see that on the top status area on the main screen though.
Some glitches have been fixed from the last version I had, which I can't recall off hand (like icons on the main screen not being visible until I move the selector).