I turned on my MacBook today and found that around some windows these annoying black boxes appear. They don't seem to be a big deal, but they are pretty annoying. I don't know if I screwed up a setting or something, I also have a lot of junk widgets that I probably should delete. Any ideas of how a can fix this? I tried to take a screen shot but the boxes disappear when I try to take a picture with the grab utility.