Scolling one "page" of the tree view on Linux often takes several seconds, which makes Mailnews pretty unusable.
Bug #26502 is related. beta2, dogfood.
this bug isn't directly a dup, but i'm going to mark it as so. basically, when anything in a tree happens, it repaints the entire tree. this sucks because it means larger trips to the x server. this will go away when 30511 is fixed. *** This bug has been marked as a duplicate of 30511 ***
Marking verified dup of 30511.