David Jones writes:
> I've already upgraded GCC, config, etc. to that required to build a
> -current kernel of Feb. 14.

1) Please, first and foremost, upgrade your sources. Random problems
   are always popping up in -current, and February 14ths would be old
   enough that it would be hard for anyone to remember what might have
   been happening on the particular day you got your sources.
2) Do some thorough hardware self-tests on your machine.

If doing 1) and 2) cures things, good -- otherwise, please come back
with specific error information.

Perry