samba very slow in windows acl tab

[CharlyBr]

Hello,

I have a samba-3.0.0 PDC with LDAP backend.
Everything works fine but when, under windows, I want
to set acl in the security tab of a file, it takes a very
long time to get the group list.
I have about 20 groups in LDAP and 6000 users.
I think samba is parsing everything when searching for groups,
It takes between 2 and 3 minutes to get the groups.

Any idea about this?

CharlyBr