this problem for im-conversation have all of the users who edited the files. don't know what's causing this one. :/
(and i'll not look into this because i use pidgin for im *g*)

and it's clear that it's getting laggier the more you add to the layout. all of the things must be rendered by the n900. and as the loading of the messages is done dynamically (always a block of 10 messages or so) it can be pretty laggy if you're scrolling fast. (and i think the conversation uses the mozilla-engine for rendering the layout... and this is not good)

(i've done some browser javascript comparisions in this forum... firefox and microb (with the mozilla-engine) suck big time... only the webkit browsers tear and midori are pretty fast at js ^^)