Alignment issue in Internet Explorer

Hi there,

I'm having some serious alignment issues in Internet Explorer. http://www.browserstack.com/ says that it's just IE 6 & 7, but we have IE 7 and 9 here and it's the same issues!

Take a look at my screenshot below, you'll see the page heading title and the sidebar creeps up and overlaps into the masthead of the site, it's very messy and actually very difficult to navigate and read anything.

It's also happening on the footer, defragmenting the Wibiya toolbar (i've deactivated this to see if it's causing the problem and it's not).

Is there a theme issue or fix?