Comment 18 for bug 500947

Dani, your problem is not related to this old Brasero bug.
You experience problems between drive and medium after
Brasero, libburn, and the drive all accepted the medium
as suitable for writing. The drive performed two WRITE
commands before it complained about the outcome of the
third one.

Further, this bug was reported for an older version of
Brasero, which used wodim and dvd+rw-tools as burn
backends. Your Brasero uses libburn. But this difference
is not supposed to make a difference in the relation
of your drive and your medium. (What kind of DVD is it,
btw ?)