Codex problem with IE7

Hi, there seems to be a bug in the codex pages when viewing them with IE7.

If you view any page in the codex and then mouse-over the main navigation bar at the top of the page, the page content dissapears.

I’m pretty sure it’s not just a problem with my pc as a friend duplicated the glitch on his pc while running IE7.

Just thought I should let you guys know.