OpenSolaris Build 117 - lxbrand zone does not have audio anymore

I used a branded Zone on my OpenSolaris box to have a CentOS 5 running with
skype inside.
Until build 111b ( OpenSolaris 2009/06 ) audio worked ( with a little delay ).
After upgrading to Build 117 and the boomer-Framework, audio does not work for
skype in the zone.