I recently played around a little bit with the TweakUI powertoy for XP. It seemed kinda cool but it messed up my setup slightly. I forget what I did but now when I put my color settings on medium (16bit), my icons look all old and dated. The colors look "worn" and "faded" but only on the desktop. When I put the color settings on high (32bit), it's fixed but I don't like having it on high. Any suggestions?

Sounds like you have changed a transparency setting in it!!!!