diff -Nur -Xpatches/no.freeciv freeciv/server/mapgen.c my_freeciv/server/mapgen.c
--- freeciv/server/mapgen.c	Sat Oct 28 09:44:42 2000
+++ my_freeciv/server/mapgen.c	Wed Dec 27 03:51:51 2000
@@ -171,6 +171,17 @@
       }
     }
   }
+
+  /* only arctic and tundra allowed at the poles (first and last two lines,
+     as defined in make_passable() ), to be consistent with generator>1. */
+  for (x=0;x<map.xsize;x++) {
+    if (map_get_terrain(x, 1)!=T_ARCTIC &&
+	map_get_terrain(x, 1)!=T_OCEAN)
+      map_set_terrain(x, 1, T_TUNDRA);
+    if (map_get_terrain(x, map.ysize-2)!=T_ARCTIC && 
+	map_get_terrain(x, map.ysize-2)!=T_OCEAN)
+      map_set_terrain(x, map.ysize-2, T_TUNDRA);
+  }
 }
 
 /**************************************************************************