RE: MultiZilla tab closing error!

I couldn't really reply properly, as no copy was sent to my email 
address...but...
 >What OS/mozilla version are you using?
 >What MultiZilla revision are you using?
 >What add-ons do you have installed?
Linux, Mozilla 1.4 (Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4; 
MultiZilla v1.5.0.3b) Gecko/20030922)
The error appears to happen on both 1.5.0.3 and 1.5.0.2-ish versions.
I have MultiZilla, SlashZilla (SlashDot sidebar), engmail, newer 
calendar, newer chatzilla, that sort of thing. But, until a day or two 
ago, it'd worked flawlessly with all of that.
I tried clearing that XUL file, and according to MultiZilla, there's no 
more recent update. I've also tried to see if it was some miscellaneous 
option selected or not selected, but I haven't found anything yet.