Just out of interest, I checked for AutoAuthSetup() on
mediawiki.org. I
found this:
http://www.mediawiki.org/wiki/Manual:Hooks/AutoAuthenticate
"[image:
Warning]<http://www.mediawiki.org/wiki/Image:Attention_niels_e
pting.svg>
*Warning*: This hook doesn't exist anymore in 1.13 or above, use
UserLoadFromSession<http://www.mediawiki.org/wiki/Manual:Hooks
/UserLoadFromSession>instead."
Maybe the Ldap extension doesn't work correctly with 1.13.1?
The auto-authentication hook changed to something else in 1.13. The
version of the plugin from SVN, which is fairly stable, but isn't
officially released, works with 1.13+, and should work with earlier
versions fine as well.
V/r,
Ryan Lane