[Samba] listing groups not working

[guido at lorenzutti.com.ar]

Im having some problems with the samba 3.0.24 in Debian Etch when I try to
list the groups, like this:

wbinfo -g

or

net rpc group -U username

All the times the output of the command is... "NOTHING".

In samba 3.0.14 (Sarge), this works OK.
I don't try in a newer version of samba.

I test this with the debug on -d 4 with the rpc command and this is the
ouput (see attached files).

The winbind package is not the problem, coz if I try from a client that
dosen't have the winbind package, the same thing happends.

Tnxs in advance.

Sorry for my english. I never study.