HTML Table breakage - what am I missing?
 

I have a problem with the fixed-width layout of one of my forum styles.

Basically, some tables, depending on the width, break in Mozilla but do not in IE or Opera.

The page validates with the WC3 (I missed a couple deliminators on & but I could care less about that right now) and I have taken great care with the html code to make it that way.

Here's a shot of the page in each browser:

IE 6.x:

http://img106.imageshack.us/img106/4118/ie61ts.png

Mozilla 1.7:

http://img106.imageshack.us/img106/1893/moz16zn.png

Opera 8.x:

http://img106.imageshack.us/img106/8130/opera0se.png

And finally, the url for the page in question so you can view the source (I left the vbulletin template comments intact to better track down the problem):

http://www.maximumgamer.com/forums/showthread.php?t=56

Anyone have any ideas at all? I'd be extremely greatful; this thing is driving me nuts.