Since you're using tables, you can add an [tt]align="center"[/tt] to the two 790-pixel-wide tables. I have them on lines 67 and 120 of your source, but they're the only "790" in the page, so you could just as easily do a text search through your source for them.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.0 x64; en-US; rv:22.214.171.124pre) Gecko/2008111500 Minefield/3.0.5pre
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