After upgrading to netbsd-current/amd64 I experienced a kernel panic 
upon boot. My experience is exactly the same as this one:

http://www.nabble.com/amd64-kernel-panic-td14355021.html
(sorry if that is not the preferred way of referencing other messages)

I thought it would be more appropriate on this list.

Enabling mp_verbose gives this error description:
> linkdev ALKA returned ACPI global int 1 
I do not know what to look for from here.

-Alex Hanson