--- a/main_gui.c	Tue May 02 19:52:56 2006 +0000
+++ b/main_gui.c	Tue May 02 21:19:48 2006 +0000
@@ -2472,3 +2472,9 @@
 	ScreenSizeChanged();
 	MarkWholeScreenDirty();
 }
+
+void InitializeMainGui(void)
+{
+	/* Clean old GUI values */
+	_last_built_railtype = 0;
+}

--- a/misc.c	Tue May 02 19:52:56 2006 +0000
+++ b/misc.c	Tue May 02 21:19:48 2006 +0000
@@ -101,6 +101,7 @@
 void InitializeDock(void);
 void InitializeDockGui(void);
 void InitializeIndustries(void);
+void InitializeMainGui(void);
 void InitializeLandscape(void);
 void InitializeTowns(void);
 void InitializeTrees(void);
@@ -165,6 +166,7 @@
 	InitializeSigns();
 	InitializeStations();
 	InitializeIndustries();
+	InitializeMainGui();
 
 	InitializeNameMgr();
 	InitializeVehiclesGuiList();