Okay, I've tried everything I can to fix my dock, but can't figure it out. The problem is that there are 3 firefox spots in my dock, one of which is the actual one, the other two simply say the app name when moused over, but are blank spaces. Whenever I try to remove them from my dock, the dock "hides" then they re-appear once again.. the problem is rather annoying and frustrating, so I'd really appreciate any help.
Screen Shot of Problem: http://i28.tinypic.com/24g5z5k.png
Screen Shot of Problem: http://i28.tinypic.com/24g5z5k.png