The cells in the sidebar used to crop. Now they don't. I'm wondering if there's bad XUL in there now. This might turn out to be a tree regression.
The bookmarks did need some XUL clean-up, but it did not cause this bug. Mailnews has This bug too. I can get the Priority column to overlap the Date column in the thread view. All I have to do is drag the separator between them to the left. Is there something special about dates that is getting messed up? The name columns work ok. Also, column resizing in general is messed up (It does not go as far as the mouse does and sometimes goes in the opposite direction). I am assuming you have another bug on this. If not, I am leaving it up to you to file a bug on it. Reassigning back to hyatt.
*** Bug 26427 has been marked as a duplicate of this bug. ***
Not a beta stopper. Setting to M15.
slamm, can you point me to the XUL for the bookmarks sidebar panel? I need to investigate it to see why it's different from other trees (like the mailnews tree).