Add Fields Menus not displaying fully

I started noting this in another topic but it should really be a separate one. Using WP3.0 and the latest (beta) version of Gravity Forms, I'm having an issue where the Add Fields menus on the right side (when you're adding or editing a form) are only using as much bertical space as the form is using on the left hand side. If the form only has a field or two and I try to open the menu for Post Fields, for example, it won't show anything. If I click to edit an existing form field, then while that form field is open -- and taking up a lot more vertical space -- I can click on Post Fields and see all of the options. Hopefully that's a clear enough explanation but let me know if not and I can send some screen shots. Tested it and the bug exists in IE8, Chrome and Safari.

Must be another script conflicting with it. Odd, because I haven't installed anything new on that set-up. Will have to do some de-activating and testing to figure out what the culprit is. Thanks for checking it.