I've had a total nightmare with iTunes today. I pulled everything from the home computer onto a portable hard drive. I then put everything straight onto my laptop, and went through over 4000 songs and deleted the stuff I didn't want. Only now have I realised that instead of pulling it from My Music, i've pulled it straight from the hard drive, meaning that as soon as I pull it out, the wee exclamation mark appears next to the song
I know what i'm doing for the next hour and a half.