In message <87g158efh2.fsf@jekyll.piermont.com>"Perry E. Metzger" writes
>
>Jonathan Stone <jonathan@DSG.Stanford.EDU> writes:
>> Back when the mcd0 probe used to match *anything* it could blow away
>> the nonvolatile config of some Ethernet cards so badly that even the
>> vendor firmware couldnt find them. It doesnt do that anymore, and it
>> does port accounting. I dont think there's any real reason (besides
>> superstition) not to enable the mcd driver.
>
>Actually, I remember there are still problems.

Really?  What are they?  

I'd asked people (including you) on more than one occasion, and I dont
recall anyone coming up with any problems with the fixed driver.