Sure. I had set the tab button titles to be links by including html. Originally this worked fine in all browsers, but for some reason it eventually stopped working in Firefox. Strangely, when I went back to the widgets to check it there, the information I had put in the tab title box had corrupted and the html was only half there. I stripped out the html and it was fine.
Original
AboutCorrupted
<a href="
Fixed
About