commit d13494e22422aae9691d2b3f6b36ae648eb4a3d7
Author: Harald Judt <h.judt@gmx.at>
Date:   Thu Oct 25 22:46:18 2012 +0200

    Tree view: Do not try to mount a device twice (bug #9412).

diff --git a/thunar/thunar-tree-view.c b/thunar/thunar-tree-view.c
index e5f8c57..5747376 100644
--- a/thunar/thunar-tree-view.c
+++ b/thunar/thunar-tree-view.c
@@ -965,9 +965,6 @@ thunar_tree_view_row_activated (GtkTreeView       *tree_view,
     gtk_tree_view_collapse_row (tree_view, path);
   else
     gtk_tree_view_expand_row (tree_view, path, FALSE);
-
-  /* ...open the selected folder */
-  thunar_tree_view_action_open (view);
 }