Why is everything centered like this?

[carwash]

On my site, http://www.talksox.com, many of my users are reporting that the text for topic titles and the text within threads themselves are centered within the tables. I use firefox and don't see this, but I do see it in IE. What templates control this, so I can fix this problem? I recently added a few things into the showthread and forumhome templates, but I don't see how that would affect the list of threads.
Thanks.

[SVTBlackLight01]

It looks like all of your tables (on forumdisplay) have align="center", so any cells within these tables that aren't aligned individually will inherit this property.