Hi I was using Excel on my MBA this evening and when I was finished I was moving folders to and from External HD and other places when I noticed that the normal blue folder icon for all my folders have disappeared to blank white pages. I tried changing them to default and my dragging a new icon in to replace them. However nothing has changed. I have shut down and restarted machine several times without luck. I'm not a massive Mac user so don't know what the prob is. Can somebody please help me. I have attached a picture to see let you see what's going on. At the top on the menu bar you can see the little blue folder but that's it. And no matter which folder you click on, the nested folders are all blank white icons Thanks in advance for any help.