Jack not working: Bus error (11.0 CURRENT)

[Sérgio Siegrist]

Tried as superuser and as normal user. Tried from the ports and from packages. Same results.
This is the console:

<start>
jackd -r -doss -r48000 -p1024 -n2 -w16
jackd 0.124.1
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
Bus error
<end>

How can I help anybody? Thanks.