Index: src/org/openstreetmap/josm/gui/dialogs/relation/ChildRelationBrowser.java
===================================================================
--- src/org/openstreetmap/josm/gui/dialogs/relation/ChildRelationBrowser.java	(revision 4465)
+++ src/org/openstreetmap/josm/gui/dialogs/relation/ChildRelationBrowser.java	(working copy)
@@ -22,6 +22,7 @@
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
+import javax.swing.SwingUtilities;
 import javax.swing.event.TreeSelectionEvent;
 import javax.swing.event.TreeSelectionListener;
 import javax.swing.tree.TreePath;
@@ -413,6 +414,13 @@
                     mergeDataSet(dataSet);
                     refreshView(r);
                 }
+                SwingUtilities.invokeLater(
+                    new Runnable() {
+                        public void run() {
+                            Main.map.repaint();
+                        }
+                    }
+                );
             } catch (Exception e) {
                 if (canceled) {
                     System.out.println(tr("Warning: Ignoring exception because task was canceled. Exception: {0}", e