Index: /trunk/src/VBox/Frontends/VirtualBox/src/medium/UIMediumEnumerator.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/medium/UIMediumEnumerator.cpp	(revision 64759)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/medium/UIMediumEnumerator.cpp	(revision 64760)
@@ -158,4 +158,13 @@
     m_fMediumEnumerationInProgress = true;
     emit sigMediumEnumerationStarted();
+
+    /* Make sure we really have more than one medium (which is Null): */
+    if (m_mediums.size() == 1)
+    {
+        /* Notify listener: */
+        LogRel(("GUI: UIMediumEnumerator: Medium-enumeration finished!\n"));
+        m_fMediumEnumerationInProgress = false;
+        emit sigMediumEnumerationFinished();
+    }
 
     /* Start enumeration for UIMedium(s) with correct ID: */