diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -916,15 +916,11 @@ static NWidgetBase *MakeResizableHeader(
 	return new NWidgetServerListHeader();
 }
 
-/* Generates incorrect display_flags for widgets NGWW_NAME, and incorrect
- * display_flags and/or left/right side for the overlapping widgets
- * NGWW_CLIENTS through NGWW_YEARS.
- */
 static const NWidgetPart _nested_network_game_widgets[] = {
 	/* TOP */
 	NWidget(NWID_HORIZONTAL),
 		NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
-		NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_SERVER_LIST_CAPTION, STR_NULL), // XXX Add default caption tooltip!
+		NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_SERVER_LIST_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, NGWW_MAIN),
 		NWidget(NWID_VERTICAL), SetPIP(10, 7, 0),
@@ -1336,7 +1332,7 @@ struct NetworkStartServerWindow : public
 static const NWidgetPart _nested_network_start_server_window_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
 		NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
-		NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_START_SERVER_CAPTION, STR_NULL),
+		NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_START_SERVER_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, NSSW_BACKGROUND),
 		NWidget(NWID_HORIZONTAL), SetPIP(10, 8, 10),
@@ -1680,7 +1676,7 @@ struct NetworkLobbyWindow : public Windo
 static const NWidgetPart _nested_network_lobby_window_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
 		NWidget(WWT_CLOSEBOX, COLOUR_LIGHT_BLUE),
-		NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_GAME_LOBBY_CAPTION, STR_NULL),
+		NWidget(WWT_CAPTION, COLOUR_LIGHT_BLUE), SetDataTip(STR_NETWORK_GAME_LOBBY_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, NLWW_BACKGROUND),
 		NWidget(WWT_TEXT, COLOUR_LIGHT_BLUE, NLWW_TEXT), SetDataTip(STR_NETWORK_GAME_LOBBY_PREPARE_TO_JOIN, STR_NULL), SetResize(1, 0), SetPadding(10, 10, 0, 10),