diff -urN old/AuthPlugin.php new/AuthPlugin.php
--- old/AuthPlugin.php	2007-08-04 12:36:26.000000000 -0400
+++ new/AuthPlugin.php	2007-10-05 10:31:11.409349600 -0400
@@ -69,9 +69,10 @@
 	 * Modify options in the login template.
 	 *
 	 * @param $template UserLoginTemplate object.
+	 * @param $type String 'signup' or 'login'.
 	 * @public
 	 */
-	function modifyUITemplate( &$template ) {
+	function modifyUITemplate( &$template, &$type ) {
 		# Override this!
 		$template->set( 'usedomain', false );
 	}
diff -urN old/SpecialUserlogin.php new/SpecialUserlogin.php
--- old/SpecialUserlogin.php	2007-10-05 10:32:34.772076800 -0400
+++ new/SpecialUserlogin.php	2007-10-05 10:32:10.385042100 -0400
@@ -700,7 +700,7 @@
 		}
 
 		// Give authentication and captcha plugins a chance to modify the form
-		$wgAuth->modifyUITemplate( $template );
+		$wgAuth->modifyUITemplate( $template, $this->mType );
 		if ( $this->mType == 'signup' ) {
 			wfRunHooks( 'UserCreateForm', array( &$template ) );
 		} else {