Just downloaded distccKNOPPIX-0.0.8.iso and tried to remaster it. Same problem, only this time I didn't modify anything. I'm testing my iso's w/vmware on a Windows pc(cheaper than writing a bunch of coasters). I checked the md5sums before and after the transfer to windows, so I'm pretty sure the transfer is working ok. The first mkisofs command complains about a floppy, but otherwise completes without error. The second mkisofs command completes without error.