I am having a problem with playing songs purchased from the iTunes store on both my MacBook Pro and my iPod. For all purchased songs, iTunes will only play 20 or 30 seconds of the song, and then it skips to the next song. My MacBook Pro is new, but I have authorised it, and I am not above my limit on computers that are authorised. Has anyone had a similar experience, or does anyone have any suggestions for correcting this. p.s. the problem continued even with iTunes 7.0.2.