I don't know if this is normal, but whenever I scroll up through a conversation, it always leaves some kind of strange shadow from the most recent text. I'm not sure how to get rid of it. Any help would be appreciated. Thanks!
Sometime recently webkit stopped calling drawRect: properly when it's performing updates, and as such we're not able to invalidate the shadow on the window (to force a redraw) on changes with a transparent background. There's a few hacks we could do, such as invalidating every 0.25 seconds for x seconds, or something along those lines, but a clean solution would be the better way. If you disable smooth scrolling it would remove the problem, but this is something that is currently not fixable in the current release.