Hi - I've had user reports that my vb4.0.4 site isn't rending correctly in IE7. I've verified this but can't figure out what is wrong. It also does not render correctly in IE8 with compatibility mode on.

Most pages look ok, but search and thread pages do not - here are some screen shots taken by a user in IE7:

My site is here:

I've tried the default style with all plugins globally disabled and I'm still getting it.

Any help would be greatly appreciated.