Thanks Dan, I thought that the larger ad might have been the cause. But it's making FT a bit cumbersome (at least for me) as now when I get to the bottom of each forum page or thread, I have to move the page to the right to use the "Go To" dropdown box to continue, or scroll back up to the top of the page each time to continue in the same forum.
I noticed that one of the smaller ads at the top of the page (the one about finding your IQ) left the page centered as usual, but most forums and threads having the much larger SPG.com ad on the top and side really moves the page over, about a full column. Not easily useful for ease of reading, as some of the threads also seem to be stretched over to one side.

bj-21.