This bug has been copied from bug #661630 and has been proposed to be backported to 5.5 z-stream (EUS).
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Under certain circumstances, the nss_ldap module may have been unable to correctly process LDAP entries with a large number of group members. This was due to an error number being accidentally overwritten before the control was returned to the caller. When this happened, various utilities failed to produce expected results. With this update, this error has been fixed, the error number is no longer overwritten, and affected utilities now work properly.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2010-0992.html