Index: trunk/src/org/openstreetmap/josm/gui/history/HistoryBrowserDialogManager.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/history/HistoryBrowserDialogManager.java	(revision 7523)
+++ trunk/src/org/openstreetmap/josm/gui/history/HistoryBrowserDialogManager.java	(revision 7524)
@@ -12,6 +12,9 @@
 import java.util.Map;
 
+import javax.swing.JDialog;
+import javax.swing.JFrame;
 import javax.swing.JOptionPane;
 import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
 
 import org.openstreetmap.josm.Main;
@@ -52,4 +55,14 @@
             placeOnScreen(dialog);
             dialog.setVisible(true);
+            // Debug stuff for #10462
+            if (Main.isDebugEnabled()) {
+                Main.debug("#10462 - JDialog.isDefaultLookAndFeelDecorated: "+JDialog.isDefaultLookAndFeelDecorated());
+                Main.debug("#10462 - JFrame.isDefaultLookAndFeelDecorated: "+JFrame.isDefaultLookAndFeelDecorated());
+                Main.debug("#10462 - dialog.isUndecorated: "+dialog.isUndecorated());
+                Main.debug("#10462 - LookAndFeel.getSupportsWindowDecorations: "+UIManager.getLookAndFeel().getSupportsWindowDecorations());
+                Main.debug("#10462 - JRootPane.getWindowDecorationStyle: "+dialog.getRootPane().getWindowDecorationStyle());
+                Main.debug("#10462 - Window.getIconImages: "+dialog.getIconImages());
+                Main.debug("#10462 - Dialog.getTitle: "+dialog.getTitle());
+            }
             dialogs.put(id, dialog);
         }