I manually updated my Ace to Gingerbread 2.3.5 today via Odin. The firmware upgrade appeared to go without a hitch and my phone now shows it is indeed running 2.3.5 (it was running 2.3.3 before). My main reason for upgrading is that it is supposed to improve performance of the phone but unfortunately, I have found performance has degraded drastically. Basically, after turning the phone on it is running crap. I have only two home screens and just scrolling between those is laggy as hell and it just jumps between the screens about a second after I swipe. Pressing an app icon lags as well and takes ages to actually do anything.