Index: program/include/rcube_plugin.php
===================================================================
--- program/include/rcube_plugin.php	(revision 2cd443315dbd0b3d7fdec78f0042f22d20e57ede)
+++ program/include/rcube_plugin.php	(revision cdf1ae0029172c27f8e66389786789d2834e04e4)
@@ -76,5 +76,5 @@
     $this->ID = get_class($this);
     $this->api = $api;
-    $this->home = $api->dir . DIRECTORY_SEPARATOR . $this->ID;
+    $this->home = $api->dir . $this->ID;
     $this->urlbase = $api->url . $this->ID . '/';
   }