Index: src/org/openstreetmap/josm/gui/ExtendedDialog.java
===================================================================
--- src/org/openstreetmap/josm/gui/ExtendedDialog.java	(Revision 1986)
+++ src/org/openstreetmap/josm/gui/ExtendedDialog.java	(Arbeitskopie)
@@ -65,6 +65,7 @@
         Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
         lbl.setMaxWidth(Math.round(screenSize.width*2/3));
 
+        this.parent = parent;
         bTexts = buttonTexts;
         setupDialog(lbl, buttonIcons);
         setVisible(true);
@@ -79,6 +80,7 @@
      */
     public ExtendedDialog(Component parent, String title, String[] buttonTexts, boolean modal) {
         super(JOptionPane.getFrameForComponent(parent), title, modal);
+        this.parent = parent;
         bTexts = buttonTexts;
     }