Has any work been done on poweroff from OFW ?

I was shutting down my shark today (running 1.4), when I thought I'd
try "poweroff" from the console.  A little bit surprisingly it didn't
say "command unknown", but rather this happened:

Calling OF_exit...
ok poweroff
[u]vm_fault(0xf365dc60, e0253000, 1, 0) -> 1
Unhandled trap (frame = 0xf70fba44)
Data abort: 'Translation fault (section)' status=005 address=e0253bf4 PC=f70044c0
Stopped in halt at      0xf70044c0:     ldrb    r3, [r1], #0x0001
db>
db> bt
No such command
db> t
_end(0xf704dfc8)
Bad frame pointer: 0xf7009448
db>

(I'm hoping this isn't what happens when it responds to unknown commands...)

Is 1.6 likely to make any difference to this?  If not, are there any
obstacles in getting it to work?  Or even, pointers to documents to
make it work?

Darren