[icecast] unable to set gid

[pharkawik at hampshire.edu]

my icecast install was working fine until today when it died 
inexplicably. now it says

peter at yurt:~$ /etc/init.d/icecast-server start
Starting /usr/sbin/icecast...
start-stop-daemon: Unable to set gid to 102

what the HELL is gid

thanking you in advance for the help,
peter

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