Recently I noticed iTunes will go mute, I think it's my stereo I have connected to my G4, but after I pause and press play, i found it was iTunes. Another time when it occurred, i noticed all other sounds from other apps worked, and again i had to pause then play iTunes. I also started to have to manually find a few of my songs that got lost somehow. I have 1300 songs, and i doubt that iTunes can't handle them all. Apple claimed that all my music library can be on a iPod, well all my music is on MP3 CDs and a few on my hard drive.