Cracher bug!

[Lars Hallberg]

I was realy meen ;-)

Happend to dubelclick a message then close the popupwindows before the 
message was shown. The message then was showed in the 3 pain folowed by 
a crach (presumably trying to uppdate the closed windows).

This is in ns6 and I have no mozilla nightly close at hand. Please, can 
someone try to conferm this bug? This is the only crach i have had with 
ns6 so i dont think it is a coinsident.

Thanks /Lars