Mac browser messing up page

I have a webpage that is running in wordpress using thesis. The page shows up fine on a PC but the sidebar is being kicked down on any mac web browser. Can anyone point me in the right direction? I've checked the con开发者_如何学Ctent, sidebar, padding, margins, etc to make sure they aren't too wide to fit in the wrapper, but I don't see the problem. I need a fresh pair of eyes. Can anyone help? http://www.thesurgicalsolution.com/

You're missing an ending </div> tag, which will affect the sidebar placement, among other code errors. See [Invalid] Markup Validation of thesurgicalsolution.com - W3C Markup Validator. Scroll down in the validation report to see line numbers and source code.

It can be resolved, for Safari 5.0.5 at least, with a clear:both added to div#content; but I'm not entirely sure why. Some of the body text is still spilling out to the right, behind the sidebars, so there may be a width/padding/margin problem there as well.