Broken in IE

I'm not sure if I'm the only one with this problem but this Module does not seem to work well in IE7. Looks ok in Firefox, Safari and Opera but in IE the content underneath the tabs get squished to the right as opposed to appearing directly underneath. I originally thought it was a problem with my wysiwyg setup (testing wysiwyg pro), but was able to replicate the problem with a fresh Drupal 5.7 install and no rich text editors. If it is in fact an IE problem, I'm sure I'm not the first to find this problem as other developers must have cross browser tested this before me. If that's the case, I'm sure this description will suffice. If it's not the case, and it's just me, I'll be happy to explain more and perhaps attach a screenshot.