can't change themes anymore

[superflysocal]

I'm not sure what happened or what program caused this, but now i cannot change themes anymore. I am stuck on windows default blue/green. If i select another theme nothing happens, background color and top and bottom bars stay the same, even with sprint default yellow. The only different when i change the theme is if use the scroll wheel and select an item on the start menu, the color of the selecte ditem is different with different themes. Has anyone seen this?