It looks like it doesn't work for me using IE5.0 either. I just verified that, in fact, it is IE5.0 that I just tried. Maybe it's because I am not a Premier Member? Maybe it worked, but my browser cache is faking me out. But when I used to clear my messages the counter underneath the mailbox icon would decrement as I marked and removed messages.

Or maybe its too full because of the Christmas rush on e-mails?!? LOL. I also tried removing a single message and that didn't work either. I will probably get back 500 messages saying, "It works for me!" Then my mailbox will really be full. LOL.