I jailbroke my iPhone 4, installed winterboard and a few themes. They were working fine. Then I installed some apps from [redacted] like SoundHound, Camera Plus etc. I am not sure what went wrong, but now any theme I apply, I just see a black wallpaper. When I uncheck all themes from WB, I can see the User Wallpaper I set, and when I select a theme from WB again I see a black wallpaper. I could not find a solution anywhere. Somebody please help!