samba - May 2006 - Need help on "winbind nss info = template sfu"

According to the doco, "winbind nss info = template sfu"
requires "idmap backend = idmap_ad"
which has been depreciated to "idmap backend = ad"
but,
[2006/05/30 13:43:23, 1] nsswitch/winbindd.c:main(953)
   winbindd version 3.0.23pre2-SVN-build-15864 started.
   Copyright The Samba Team 2000-2004
[2006/05/30 13:43:23, 0] sam/idmap.c:idmap_init(152)
   idmap_init: could not load remote backend 'ad'

I can't find any ad.so module in source.

What am I doing wrong?  Is the doco out of sync?

"wbinfo -g" returns the sfu mapped groups.
"wbinfo -r user" fails.

FC4 2.6.16-1.2096_FC4smp
samba Version 3.0.23pre2-SVN-build-15864

Used to work.  Don't know when it quit working because
if the users own the directory, they can read and write
files.
The only issue is for group write permissions where
others don't have write permission where the user
is not the owner.

Haven't been collaborating much lately.

Regards, Doug