While attempting to burn a music CD in iTunes on her 15" Powerbook (new, combo-drive model), my friend has regularly (about 3 times so far) encountered a pop-up window about a quarter of the way through the burning session saying that it has "overridden its buffer". Neither of us have any idea what this message meansUsually afterwards, she just ejects that CD and tries a new CD and it works fine, which is what I was wondering - is this a problem with the CDs (they're Verbatim brand, not Apple), is it something in iTunes, or is it something with the burner (she's only burned one CD out of the Finder, but it hasn't caused any problems)? Would a repair permissions help? Or is it just something to live with? Thanks for any help!