I recently switched computers, and now thumbnails aren't showing up anymore. When I use Firefox there's nothing there at all (I can still hover the cursor over the blankness and click on it, but it's kind of a bitch). I don't have any sort of ad-blocker running on the browser.

I've also tried IE, but instead of a thumbnail I'm just getting a "-" (i.e. minus sign), or sometimes the filename. I am running IE Pro, but I don't think it's blocking them.

Can anyone help? I've looked through the settings under "user cp," but nothing jumped out at me.