Index: src/org/openstreetmap/josm/gui/download/BoundingBoxSelection.java
===================================================================
--- src/org/openstreetmap/josm/gui/download/BoundingBoxSelection.java	(revision 674)
+++ src/org/openstreetmap/josm/gui/download/BoundingBoxSelection.java	(working copy)
@@ -40,7 +40,7 @@
 			new JTextField(11),
 			new JTextField(11) };
 	final JTextArea osmUrl = new JTextArea();
-	String oldUrl;
+	String oldUrl = "";
 	
 	final JLabel sizeCheck = new JLabel();