Index: Zend/Loader.php
===================================================================
--- Zend/Loader.php     (.../trunk/core/library)        (revisione 25)
+++ Zend/Loader.php     (.../vendor/zf/1.5.1)   (revisione 25)
@@ -43,25 +43,18 @@
      * If the file was not found in the $dirs, or if no $dirs were specified,
      * it will attempt to load it from PHP's include_path.
      *
-     * @param string $class        - The full class name of a Zend component.
-     * @param string|array $dirs   - OPTIONAL Either a path or an array of
-     *                               paths to search.
-     * @param boolean $useAutoload - OPTIONAL Whether to use or not an autoload
-     *                               defined function
+     * @param string $class      - The full class name of a Zend component.
+     * @param string|array $dirs - OPTIONAL Either a path or an array of paths
+     *                             to search.
      * @return void
      * @throws Zend_Exception
      */
-    public static function loadClass($class, $dirs = null, $useAutoload = true)
+    public static function loadClass($class, $dirs = null)
     {
         if (class_exists($class, false) || interface_exists($class, false)) {
             return;
         }
 
-        if (spl_autoload_functions() !== false and $useAutoload) {
-            spl_autoload_call($class);
-            if (class_exists($class, false) || interface_exists($class, false))  return;
-        }
-
         if ((null !== $dirs) && !is_string($dirs) && !is_array($dirs)) {
             require_once 'Zend/Exception.php';
             throw new Zend_Exception('Directory argument must be a string or an array');
@@ -185,7 +178,7 @@
     public static function autoload($class)
     {
         try {
-            self::loadClass($class, null, false);
+            self::loadClass($class);
             return $class;
         } catch (Exception $e) {
             return false;