CHGRP and CHOWN BUG with LDAP and SuSE 9.3

Hi all, I made tests with LDAP in SuSE 9.3 and find a problem: "chgrp" and "chown" fails when changing ownerships from a LDAP group with more than 50 users, Yast Online Update don't report any correction or comments to this problem ! A friend made a nss_ldap compilation from source and the problem was solved, but I did a stop in NSCD daemon and the problem returns !!! I could not try in other SuSE versions like SLES 9 and OpenSuSE 10, but I can do it in next days and I will report in this list. Anyone had this problem ??? Maybe this is a bug from "Core Utils" or "NSS_LDAP" ?? Thanks All ! Roberto C. Duarte