I just tried syncing to a new computer because I can't use itunes on the old one. I had about 220 songs on my 8gb touch before I synced and during syncing I had troubles with authorization and such. But I fixed that but when I finished only 100 of the songs came through out of the 600 that were in this itunes library. Some songs that were on my ipod before I synced didn't even make it. So how do I get back the 500 songs that have the exlamation mark back? I don't know where their original files are..