[Samba] Unable to initgroups. Error was Operation not permitted

[peabresch at pepco.com]

I keep getting the following message in the Samba Logs. I am running Samba 
V2.5 with Windbind. Does anyone know what these messages mean?
Thanks.


[2002/07/23 08:57:44, 0] smbd/sec_ctx.c:initialise_groups(229)
  Unable to initgroups. Error was Operation not permitted
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