Problem with Pioneer DVR-105

[olleh]

Just got my drive a while ago... burned 2 good discs after upgrading to the hacked 1.30 firmware. Both discs were princo 1x and they both burned fine at 2x.

The 5 1x princo discs i've burned after the first 2 all have bad files at the end of the disc for some reason. By bad files I mean files that can't be read by the burner, dvd-rom or dvd-players.

What could the problem be?!?!?! I'm so scared the firmware has damaged the burner...