ok, i have an '05 powermac g5, dual 2.0ghz with 3 gigs of ram and this problem just started today. any song i listen to in itunes skips horribly! also, the audio from any movie file i play in either quicktime or VLC has the same problem. i have updated all three programs to the current version. i tried disabling my login items as recommended by some advice i found by googling, but this didn't work either. i also made a new admin account to see if the problem would still occur on a fresh account and it did. i don't know what else to do. what could be causing this problem? might it be hardware related? i don't know how to check for that.