=== modified file 'src/com/goldencode/p2j/ui/client/gui/ComboBoxGuiImpl.java'
--- src/com/goldencode/p2j/ui/client/gui/ComboBoxGuiImpl.java	2016-01-25 17:05:09 +0000
+++ src/com/goldencode/p2j/ui/client/gui/ComboBoxGuiImpl.java	2016-02-03 19:33:16 +0000
@@ -947,6 +947,12 @@
       super.exitDropDown();
 
       // clean up registry from drop-down widgets added in GUI code
+      TopLevelWindow<GuiOutputManager> parentWindow = topLevelWindow();
+      TopLevelWindow<GuiOutputManager> dropDownWindow = dropDown.topLevelWindow();
+      if (parentWindow != dropDownWindow)
+      {
+         dropDownWindow.destroy();
+      }
       OutputManager.instance().getRegistry().removeWidgetsRecursive((Widget) dropDown);
    }