This is how I fixed the problem of my apps not opening on my IPod touch. 1. Take your IPod back to factory default. Do complete system restore from the IPod internally. 2. Remove backups off computer. Delete the back up. Remove the device from iTunes. 3. Make sure your computer is authorized in iTunes. 4. Plug in IPod and resync. Reset it up with what you want on it. 5. (Big one) Make sure to hit the eject button before disconnecting the iPod from the computer. 6. It should be fixed. This is what I did and mine is working perfect again for the past two weeks. (Make sure account is authorized and make sure to hit eject button.) Let me know if this works for you. It should.