So, I *think* I fixed the problem today. At least my reliable method of
triggering this (synchronizing a NFS mailbox in mutt) doesn't make the
driver hang again.

Do something like this (I'm assuming you have anoncvs or cvs access 
set up for your source tree):

cd sys/dev/isa
cvs diff -u -r1.45 -r1.48 if_iy.c | patch -p0

cd /your/kernel/compile/directory; make; make install; shutdown -r +1 "YAST"
(yet another stupid test)

Regards,
	Ignatios