the rk11 controller (ibdr_rk11) doesn't issue an interrupt after a seek or drive clear command is accepted. Only the 'seek done' interrupt is issued. This causes a "rk ? csr 177400 vector 220 didn't interrupt" message during 2.11BSD boot, no other effects seen so far. Will be fixed in next release.
The rk probe failure in autoconfig causes that device isn't attached by autoconfig. If system is booted from rk this has no effect because the boot device is already attached. But if system is booted from rl the rk disks aren't usable.
Fixed in rev 30 (Release w11a_V0.65)