Problem with folder names

I logged into MobileMe last night and noticed a few things which were unusual. First of all, the introductory movie that usually plays when you sign up to MobileMe started playing. Then, when I cancelled it, my Trash Folder had been renamed "trashFolder: Deleted Messages". I checked it in Mail.app and the Trash folders there are named On My Mac and MobileMe.

I also noticed that when I deleted any of the messages from my inbox on MobileMe, it deleted it immediately and did not store them in the Trash folder for emptying.

I'm in a support chat with somebody from Apple right now but I wondered if anybody else had experienced a similar problem at all?