I can confirm this bug.
# balance -f -d -p 25 host1 host2
argv[0]=balance
bindhost=NULL
source port 25
file /var/run/balance/balance.25.0.0.0.0 already exists
setsockopt(IPV6_V6ONLY=0): Protocol not available
--
Balance unable to start (setsockopt(IPV6_V6ONLY=0): Protocol not available)
Public bug reported:
Binary package hint: mplayer
todays mplayer updates broke the ogg theora in mplayer...
ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Fri Mar 16 01:05:11 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/mplayer
Package: mplayer 2:1.0~rc1-0ubuntu8