[Drunken F00l]

LOLOL CONTACT STEAM SUPPORT

No, kidding. Did you have a custom skin or something that may have messed up in a recent update? Anyways, if you don't want to lose all your stuff and reinstall Steam do this:

1. Close Steam.
   
2. Go to you Steam install folder (ex: C:\Program Files (x86)\Steam)
   
3. Move steamapps and userdata out to somewhere else temporarily.
   
4. Uninstall Steam.
   
5. Delete anything left over in the Steam directory to be sure. Maybe check it out to make sure it's not something you want.
   
6. Install Steam. Do not launch Steam. If it launches on its own, close it, whatever.
   
7. Put steamapps and userdata back.
   
8. Launch Steam and login.

That should keep all your games and crap the same but give you a fresh copy of Steam.