It may be CGI-based and cannot support img_auth.
See http://www.mediawiki.org/wiki/Manual:Image_Authorization.',
'img-auth-notindir' => 'Requested path is not in the configured upload directory.',
-'img-auth-badtitle' => 'Unable to construct a valid title from `$1`.',
-'img-auth-nologinnWL' => 'You are not logged in and `$1` not in whitelist.',
-'img-auth-nofile' => 'File `$1` does not exist.',
+'img-auth-badtitle' => 'Unable to construct a valid title from "$1".',
+'img-auth-nologinnWL' => 'You are not logged in and "$1" not in whitelist.',
+'img-auth-nofile' => 'File "$1" does not exist.',
'img-auth-isdir' => 'You are trying to access a directory "$1".
Only file access is allowed.',
'img-auth-streaming' => 'Streaming "$1".',