I am also experiencing inconsistent behaviours with recent -current.
It makes panics and freeze.  Sometimes poweroff-on-cycles ease the
symptoms with identical kernels...

> Just wanted to have a 5000/240 boot a -current NetBSD.
> I started with 1.3.2 (booted with the ULTRIX 4.4 bootloader,
> running diskless) and compiled -current GENERIC.
> When I try to boot it (with the ULTRIX bootblocks again)
> I get:
>  ...
> Starting at 0x80030000
> trap: address error (load or I-fetch) in kernel mode
> status=0x80000, cause=0x30000810, pc=0x80000024,
> v=0x203a202e, usp=0x52555845, ksp=0xffffde20,
> pid=0, cmd=
> panic: trap
> halted
>
> What's going on here?

Tohru Nisimura
Nara Institute of Science and Technology