Index: /trunk/src/VBox/Frontends/VirtualBox/src/medium/UIMediumManager.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/medium/UIMediumManager.cpp	(revision 68017)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/medium/UIMediumManager.cpp	(revision 68018)
@@ -1519,4 +1519,5 @@
     {
         /* Configure tree-widget: */
+        pTreeWidget->setExpandsOnDoubleClick(false);
         pTreeWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
         pTreeWidget->setContextMenuPolicy(Qt::CustomContextMenu);