Ian.Fry@sophos.com <Ian.Fry@sophos.com> typed:
: I am trying to update a machine running 1.5 to -current, but the new ahc
: driver causes a panic whilst going multi-user. I've tried using
: AHC_NO_TAGS, but that doesn't make any difference.

I had the same problem, though building the kernel with -O rather than -O2 
worked around whatever optimisation problem occured on my machine.

Regards,
Geoff