For some reason many (not all) of my Illustrator 10 files are being displayed with the wrong icon. They show up as .PDF icons. The first time I noticed it i tried to open it and i got some message like, "This macitosh cannot open the files due to a system error". After i got that i fixed permissions. The files still displayed the wrong icon but luckly they now open up. Is there any way to "repair icons" like on a pc?