--- engines/xcache.php	2008-03-31 12:40:50.000000000 +0400
+++ engines/xcache.php	2008-05-23 21:30:33.000000000 +0400
@@ -130,7 +130,7 @@ class xcacheCache extends Cache {
       $this->unlock();
     }
     else {
-      if (!empty($key) && !empty($value)) {
+      if (!empty($key)) {
         if (!xcache_unset($this->key($key))) {
           $return = FALSE;
         }