So, I have a relatively new macbook 2ghz core 2 duo 1 gig ram. So, I'm having this problem where sometimes, I'll open a folder and all of the sudden the folder will disappear, the desktop will flash where I lose all the icons and then they will show up again and everything will be normal. This has happened several times over the past two days and I have tried resetting my permissions. Any ideas whats happening?