2.0RC4 disk handling problems

So, since I couldn't get -current to label my disk, I tried netbooting 
a 2.0RC4 snapshot.  It labeled my disk, I installed the -current 
bootloader, and tried booting from it:
NeXT> bsd(1,0,0)
booting SCSI target 2, lun 0
Bad blkno
Bad version 0x57
Bad version 0x0
Bad version 0x0
Bad label
NeXT>

Same problem if I use the 2.0RC4 or 1.6.2 bootloader.  Seems to be a 
disk labeling problem.  Any ideas?

   -- MW