Does NetBSD (current or old) support the new B rev of this card?

We have many rev A's running at 10 and 100 in our lab on PC164LX
motherboards (SRM versions 5.1) with NetBSD 1.2G (approx Nov '97 version).

One of our customers in japan can no longer get rev A!  They are getting
a new rev B.  Many times, they unplug the twisted pair cable from the board,
and when the cable is re-inserted, the system crashes.

PS I have not found out yet if its trapping, or panicing.