Okay, that is a big help, but it's still not quite right.
I changed the layout to 725 pixels and changed my header table to 725 (I made it green so you could see). PhotoPost is still larger (can't see anything that would push the table out) than my header file. Also the Reg bar is narrower than Photopost.
I also changed my sidebar to 145 pixels from 20%, no difference. http://www.bumpstop.com/gallery/