Um, how do I fix this?

I use Mozilla Firefox for my primary browser in just about everything I do on the 'net, so I wasn't aware (oops!) of this little problem on my board.

[Linked Image from adwoff.com]

See the dreaded *red X* next to the little dragon/under "The Mod Squad Deluxe"?

It shows on IE's browser, but not Firefox.

When I do a property deal, it says: http://adwoff.com/messageboard/ubbthreads.php/topics/696712/3hearts.gif

How do I find the file to remove the 3hearts.gif?

~Sue <<-- clueless about a lot of things! tongue