*wry* All the hrs that are under my control are css only. The ones that are part of the core code... well, we're trying to keep core mods to an absolute minimum so site updates aren't slowed down by having to update each page and template by hand. This means a lot of hacking about to override the code in place.

On the bright side, using a pixel width margin in the css seems to have taken care of the problem. Let me know if you're still seeing it, though.