On the same machine, I see: cygwin-1.5$ id -G | wc 1 24 136
cygwin-1.7$ id -G | wc 1 46 264 cygwin-1.7$ printf %s\\n `id -G` | sort -u | wc 24 24 136 In other words, under cygwin 1.7, the last 22 entries are placed in the getgroups results twice. -- Eric Blake -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple