Index: xfce4-panel-4.10.0/plugins/windowmenu/windowmenu.c
===================================================================
--- xfce4-panel-4.10.0.orig/plugins/windowmenu/windowmenu.c
+++ xfce4-panel-4.10.0/plugins/windowmenu/windowmenu.c
@@ -681,10 +681,13 @@ window_menu_plugin_window_state_changed
     plugin->urgent_windows--;
 
   /* check if we need to change the button */
-  if (plugin->urgent_windows == 1)
+  if (PANEL_HAS_FLAG (new_state, URGENT_FLAGS) && plugin->urgent_windows == 1)
     xfce_arrow_button_set_blinking (XFCE_ARROW_BUTTON (plugin->button), TRUE);
-  else if (plugin->urgent_windows == 0)
+  else if (!PANEL_HAS_FLAG (new_state, URGENT_FLAGS) && plugin->urgent_windows == 0)
     xfce_arrow_button_set_blinking (XFCE_ARROW_BUTTON (plugin->button), FALSE);
+
+  if (plugin->urgent_windows < 0)
+    plugin->urgent_windows = 0;
 }
 
 
@@ -1360,6 +1363,10 @@ window_menu_plugin_menu (GtkWidget
       && !gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
     return;
 
+  /* stop blinking */
+  plugin->urgent_windows = 0;
+  xfce_arrow_button_set_blinking (XFCE_ARROW_BUTTON (plugin->button), FALSE);
+
   /* popup the menu */
   menu = window_menu_plugin_menu_new (plugin);
   g_signal_connect (G_OBJECT (menu), "deactivate",