I'm having a lot of problems with displaying the model admin (IE6, latest version of FF, Chrome, etc)

Basically, when I do a search on the managed classes the content displays, but unformatted, like it wasn't using CSS. The "delete" button is displayed as text with a blue rectangle around it.

And if I try to click on any of the unformatted links, I get the "I can't handle sub-URLs of a ModelAdmin_CollectionController object." message.

Sometimes, when there's more than one tab I might luck out and find one of the tabs where the content displays correctly and, after that, the display is pretty much ok, at least until next time.

Any idea of what that's all about?