There are dotted lines when clicking on the UBBC: http://i185.photobucket.com/albums/x20/magedesigns/misc/ubbc-2.jpg

It also does the same thing here.

Windows 7
FireFox 3.5.3
http://icodes.vforums.co.uk

Seems to be some firefox specific issue. I've written a fix for it which will be included in the latest set of updates.

Just out of interest, does the border stay around the image (until you click another button) or does it appear and then disappear moments later? I just ask as on my version of Firefox it only flashes for less than a second.

Well when I pressed it it would stay even though I clicked off the button, I'd have to click another button for it to turn off which then that other button was the same way. I had to click on the forum or in the text field to stop it.