Missing XL0 and USB printer after upgrade

[Edmund Craske]

<snip> 
> I played with the kernel config (the two machines are almost 
> identical (currently defined but disabled SCSI controller in 
> the server machine))  I also tried SCHED_ULE and SCHED_4BSD 
> and it did not seem to change anything.

Is it possible you removed something like device mii here?
That would easily stop the network card from working. I
presume you have already tried a GENERIC kernel though, of
course.
 
Ed