CD Burning on Mac

Hi,

I just played around with a friends mac, and found it very nice to use... However when I tried to burn some CD's I kept getting some errors along the lines of buffer under runs. This leads me to the following question:

Do mac's have any kind of buffer under run protection and is this a common problem? How good is the mac at burning CD's while you are multitasking?

Thanks,
mblackshaw