diff -Nur -X/data/freeciv-dev/freeciv/diff_ignore freeciv/client/packhand.c roadciv/client/packhand.c
--- freeciv/client/packhand.c	Fri Oct 27 23:42:17 2000
+++ roadciv/client/packhand.c	Fri Jan  5 20:02:15 2001
@@ -1081,6 +1081,12 @@
 	popup_science_dialog(1);
       did_advance_tech_this_turn=game.year;
       science_dialog_update();
+
+      /* If we just learned bridge building and focus is on a settler
+	 on a river the road menu item will remain disabled unless we
+	 do this. (applys in other cases as well.) */
+      if (get_unit_in_focus())
+	update_menus();
     } 
   }
 
@@ -1468,7 +1474,15 @@
 	refresh_tile_mapcanvas(x, y-1, 1);
       if(tile_is_known(x, y+1)>=TILE_KNOWN_FOGGED)
 	refresh_tile_mapcanvas(x, y+1, 1);
-    } 
+    }
+  }
+
+  /* update menus if the focus unit is on the tile. */
+  if (tile_changed) {
+    struct unit *punit = get_unit_in_focus();
+    if (punit && same_pos(punit->x, punit->y, packet->x, packet->y)) {
+      update_menus();
+    }
   }
 }