- fixing bug reported by Remco.

includes/theme.inc

@@ -102,7 +102,7 @@ function theme_init() {
   $name = $user->theme ? $user->theme : variable_get("theme_default", 0);
   if (is_object($themes[$name])) {
     include_once($themes[$name]->filename);
-    $theme_class = "Theme_$user->theme";
+    $theme_class = "Theme_$name";
     @$obj =& new $theme_class;
     return $obj;
   }