Let´s see. N900 has 800x480 pixels and yes i know i know it´s not excuse, but still please remember that when comparing to other devices

IMHO n900 UI animation in overall quite smooth but is it as smooth as on iphone or droid? Probably not. Does it matter? Probably yes, but how much? Probably not so much when it´s on level that´s bearable for most of people. To me for example photo gallery´s scrolling performance is bad but probably to quite many people it´s just ok and i have seen people who just don not even care because it has xterm.

There is nothing to fix. Maybe enhance but not fix because nothing is broken. N900 has quite many bugs if you search in bugzilla (but please remember that those that have not been confirmed might be just user errors and are not so critical as those that are confirmed) There is stuff that needs to be fixed and priority for example conversations scrolling and photo gallery scrolling is not probably high :| I would like to them be on top of list but then again its just me..

http://www.octofish.net/bugjar/2010/...bug-ja-72.html
http://www.octofish.net/bugjar/2010/...ons-bu-72.html