Index: server/plrhand.c
===================================================================
RCS file: /home/freeciv/CVS/freeciv/server/plrhand.c,v
retrieving revision 1.235
diff -u -r1.235 plrhand.c
--- server/plrhand.c	2002/05/24 07:59:06	1.235
+++ server/plrhand.c	2002/05/26 12:13:33
@@ -262,6 +262,7 @@
 
   set_invention(plr, tech_found, TECH_KNOWN);
   update_research(plr);
+  update_all_effects();
   remove_obsolete_buildings(plr);
   if (tech_flag(tech_found,TF_RAILROAD)) {
     upgrade_city_rails(plr, was_discovery);