Hello folks, The problem started just 2 days ago. I was playing some music, and suddenly it stopped. I look at iTunes, the song was in Play mode, but not playing, you know. I skipped to the next song, and it solved the problem. But now it keeps coming back, and I also noticed that the whole system starts lagging, for a few seconds then goes stable again. I checked out my activity monitor, and iTunes is normal, and I usually have 5-6 gigs of ram free. I ran the disk utility tests, thinking it might be a HDD-related problem, but it wasn't the case, the test came out green. All my music is on my internal HDD. It's a 320gig. I'm under Lion 10.7.1, Macbook pro i5 2.4, 8 gigs of ram.