samba - Aug 2003 - access to samba share using samba 3.0 b2

hi all,

we made a smaba share on a debian 3 /samba 3 b2 machine, that is accessed by
a number of windows-users. some of those users can access the share, some
not. for those who are not able to access the share i found in
/var/log/samba/log.machinename "get_user_groups_from_local_sam: failed to
convert gid 0 to a sid!". any ideas?

regards
lorenz