>fpu0 at mainbus0 (mc68882)
>boot device: sd0
>root on sd0a dumps on sd0b
>
>
>Then it dumped me into the debugger with a bus error.  I switched back to
>my GENERICSBC-45 kernel, and everything worked fine again.  Is there any
>problems with #50 that I should know about?  My system is as follows...

I'm also having a similar problem. Which SCSI driver/chip is being found?
Mine says

esp0 at obi0 (quick): address 0x905000, NCR5c96: 16MHz, SCSI ID 7

At the present time, the work-around for me is to boot into single-user mode,
fsck
	or
fsck -f

mount -a
exit

and all is well!