Index: /trunk/src/org/openstreetmap/josm/gui/dialogs/LayerListDialog.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/dialogs/LayerListDialog.java	(revision 3940)
+++ /trunk/src/org/openstreetmap/josm/gui/dialogs/LayerListDialog.java	(revision 3941)
@@ -187,4 +187,5 @@
         layerList.addMouseListener(new PopupMenuHandler());
         layerList.setBackground(UIManager.getColor("Button.background"));
+        layerList.putClientProperty("terminateEditOnFocusLost", true);
         layerList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
         layerList.setTableHeader(null);