In response to an earlier post, Mail.app *is* broken in one small area that relates to the interface but still involves (from what I can ascertain) the actual coding: the Junk/Not Junk item of the toolbar fails to update properly in some situations.
I haven't had too many issues besides that and iChat's colours--and maybe Safari's windows (if you click Safari in the dock and have multiple windows with multiple tabs open, will the previously-front window remain in front? technically, yes; visually, not always).
So far I've seen only mainly interface glitches and some .Mac synching stuff--and perhaps some BSD subsystem issues (with the LaunchDaemons, for instance). If Server version has real issues, that's one thing; but are we talking mainly GUI glitches in Client?
I haven't had too many issues besides that and iChat's colours--and maybe Safari's windows (if you click Safari in the dock and have multiple windows with multiple tabs open, will the previously-front window remain in front? technically, yes; visually, not always).
So far I've seen only mainly interface glitches and some .Mac synching stuff--and perhaps some BSD subsystem issues (with the LaunchDaemons, for instance). If Server version has real issues, that's one thing; but are we talking mainly GUI glitches in Client?