[pawel]

Perhaps it won't be a bad burn but definitely it won't be the best. Difference between uTorrent and i.e. Azureus is that uTorrent uses as much as possible hard disc, while Azureus stores most data in RAM - hence it 'eats' more memory resources.

For my experience I can state that any additional program in the background which is active (HD / RAM) has impact on burn quality, not mention such which uses the same files being burnt.

So, I would never burn files which are in the same time read by any other program. Whole DVD takes approx. 15 minutes to burn, so it is not long, and big upload loss.

The above applies to Windows XP / Vista / Linux. I don't how it is on Mac.