This Wordpress site looks fine on most browsers but is really breaking up on Mac Safari 3.2 and FF on Mac.

The right sidebar pushes down below the bottom of the middle column.
Can anyone tell me where to look for the problem.
A screen shot from BrowserShots is enclosed that shows the problem.

Thank you

http://gigwebspace.com/jaime

I've attached a second screen shot. In this case the right sidebar disappears in FF 3.1 and Safari 4.0.

Resolved-I changed the margins on the sidebars-looks like Safari and FF latest and beta versions like a bit more room than the others.