I was trying to hide the Music and Video icons using Poof, but it wouldn't work, so I removed the app folder MobileMusicPlayer.app off the iPod so the icons would go away. I kept it this way for a few days. When I put the folder back on so that it was exactly how it was before, the apps wouldn't work. Whenever I clicked Music or Video, it just flashed a screen then went back to the home screen. Does anyone have any idea how to fix this? I cannot restore because I got my iPod with 3.1.2 but after 3.1.3 was released, and it's unjailbreakable 3rd gen.