Build 4622 and IE9

I was testing out ADAudit Plus with the eval, and it was Build 4601. We just purchased the software and I went to do a full install with the latest version of 4622. Got it running fine, but when I try and view the 'Reports' tab, a lot of the options aren't showing up on the left anymore (the root options show up, but when I expand them the menu is blank or only partially filled). When I went back to my 4601 test, still fine. I updated the test to 4622, it started doing it, so it's an issue with the newer build. When I view it with Chrome, it works fine, but I'd like to keep it working with IE9 . Screenshot attached. Thx!