cannot umount

Hi, I am playinh with packet writing again since it is included in the main 2.6 tree, and having lots of problems. First, this freezing umount thingy also hits me, however emergency sync seems to be working. Also could be relvante information that after trying to umount the dvd+rw, I cannot umount _anything_ even a hdd partition mounted just to back it up to dvd. I'm runing 2.6.11-pre1, pktcdvd 0.2.0a Any ideas? compi