I forgot to mention where to get the new code! Either do a CVS update of a SAMBA_3_0 branch, or grab this file: http://samba.org/ftp/unpacked/samba_3_0/source/nsswitch/winbind_nss_aix.c and put it in source/nsswitch/ in your Samba3 source tree, then recompile the nsswitch/WINBIND module. Cheers, Tridge