I have a really nasty bug, Im not sure if its native to my system (Ubuntu dapper drake) , but thats my guess since its so severe you'd probably fix it right away if it weren't :O
Im on a laptop, and since the mousepad is kinda glitchy I click a bit now and then by mistake. Sometimes, when I accedently click, I drag and drop, but since my intention is not to drag and drop, I drop is almost instantly after I start draggin. When I do this in CB, there is a bit of a delay from when the cursor changes and when the document icon apears udnerneath the cursor. If the drop triggers before the document icon apears, my entire system freezes over. It seems CB consumes all input from both keyboard and mouse, I can move the mouse cursor, but mousclicks and keystrokes do nothing. I can see my system monitor graphs changing in my panel, but all I can do is hold the powerbutton and wait for shutdown.
I can produce this error on purpose, all I need is a quick drag'n'drop, but I dont know if I can get you a crashlog or anything, since I cant send any input to the system after it.
I've tested it a bit extra now just to make sure Im just sending you some imaginary bullshit, and I can produce the crash even with only the "Start here" tab open. It seems I can drag both tabs and text.
I'm willing to do some testing if you can come up with a way to capture the events, lovely IDE ^^