diff --git a/src/common/gamecode/creport.c b/src/common/gamecode/creport.c
index c680c3268..3e97085cf 100644
--- a/src/common/gamecode/creport.c
+++ b/src/common/gamecode/creport.c
@@ -977,7 +977,7 @@ cr_find_address(FILE * F, const faction * uf, const faction_list * addresses)
       fprintf(F, "PARTEI %d\n", f->no);
       fprintf(F, "\"%s\";Parteiname\n", f->name);
       if (f->email) fprintf(F, "\"%s\";email\n", f->email);
-      fprintf(F, "\"%s\";banner\n", f->banner);
+      if (f->banner) fprintf(F, "\"%s\";banner\n", f->banner);
       fprintf(F, "\"%s\";locale\n", locale_name(f->locale));
       if (f->alliance!=NULL && f->alliance==uf->alliance) {
         fprintf(F, "%d;alliance\n", f->alliance->id);
@@ -1412,7 +1412,7 @@ report_computer(const char * filename, report_context * ctx, const char * charse
 
   fprintf(F, "\"%s\";Parteiname\n", f->name);
   fprintf(F, "\"%s\";email\n", f->email);
-  fprintf(F, "\"%s\";banner\n", f->banner);
+  if (f->banner) fprintf(F, "\"%s\";banner\n", f->banner);
   print_items(F, f->items, f->locale);
   fputs("OPTIONEN\n", F);
   for (i=0;i!=MAXOPTIONS;++i) {
diff --git a/src/common/gamecode/economy.c b/src/common/gamecode/economy.c
index 8c35cc753..5a882365c 100644
--- a/src/common/gamecode/economy.c
+++ b/src/common/gamecode/economy.c
@@ -3219,12 +3219,11 @@ peasant_taxes(region * r)
 
   maxsize = buildingeffsize(b, false);
   morale = region_get_morale(r);
-  if (maxsize > morale) {
+  if (morale<maxsize) {
     maxsize = morale;
   }
-
-  if (maxsize>0) {
-    int taxmoney = (int)((money * maxsize) * b->type->taxes(b));
+  if (maxsize>0 && morale>0) {
+    int taxmoney = (int)(money * b->type->taxes(b, maxsize));
     if (taxmoney>0) {
       change_money(u, taxmoney);
       rsetmoney(r, money - taxmoney);
@@ -3235,15 +3234,16 @@ peasant_taxes(region * r)
 }
 
 void
-produce(void)
+produce(struct region *r)
 {
   request workers[1024];
-  region *r;
   request *taxorders, *sellorders, *stealorders, *buyorders;
   unit *u;
   int todo;
-  int rule_taxation = get_param_int(global.parameters, "rules.economy.taxation", 0);
-  int rule_autowork = get_param_int(global.parameters, "work.auto", 0);
+  static int rule_taxation = -1;
+  static int rule_autowork = -1;
+    boolean limited = true;
+    request * nextworker = workers;
 
   /* das sind alles befehle, die 30 tage brauchen, und die in thisorder
   * stehen! von allen 30-tage befehlen wird einfach der letzte verwendet
@@ -3255,141 +3255,141 @@ produce(void)
   *
   * lehren vor lernen. */
 
-  for (r = regions; r; r = r->next) {
-    boolean limited = true;
-    request * nextworker = workers;
-
-    assert(rmoney(r) >= 0);
-    assert(rpeasants(r) >= 0);
-
-    if (r->land && rule_taxation==1) {
-      /* new taxation rules, region owners make money based on morale and building */
-      peasant_taxes(r);
-    }
-
-    buyorders = 0;
-    sellorders = 0;
-    working = 0;
-    nextentertainer = &entertainers[0];
-    entertaining = 0;
-    taxorders = 0;
-    stealorders = 0;
-
-    for (u = r->units; u; u = u->next) {
-      order * ord;
-      boolean trader = false;
-
-      if (u->race == new_race[RC_SPELL] || fval(u, UFL_LONGACTION))
-        continue;
-
-      if (u->race == new_race[RC_INSECT] && r_insectstalled(r) &&
-        !is_cursed(u->attribs, C_KAELTESCHUTZ,0))
-        continue;
-
-      if (fval(u, UFL_LONGACTION) && u->thisorder==NULL) {
-        cmistake(u, u->thisorder, 52, MSG_PRODUCE);
-        continue;
-      }
-
-      for (ord = u->orders;ord;ord=ord->next) {
-        switch (get_keyword(ord)) {
-        case K_BUY:
-          buy(u, &buyorders, ord);
-          trader = true;
-          break;
-        case K_SELL:
-          /* sell returns true if the sale is not limited
-           * by the region limit */
-          limited &= !sell(u, &sellorders, ord);
-          trader = true;
-          break;
-        }
-      }
-      if (trader) {
-        attrib * a = a_find(u->attribs, &at_trades);
-        if (a && a->data.i) {
-          produceexp(u, SK_TRADE, u->number);
-        }
-        fset(u, UFL_LONGACTION|UFL_NOTMOVING);
-        continue;
-      }
-
-      todo = get_keyword(u->thisorder);
-      if (todo == NOKEYWORD) continue;
-
-      if (fval(r->terrain, SEA_REGION) && u->race != new_race[RC_AQUARIAN]
-      && !(u->race->flags & RCF_SWIM)
-        && todo != K_STEAL && todo != K_SPY && todo != K_SABOTAGE)
-        continue;
-
-      switch (todo) {
-
-        case K_ENTERTAIN:
-          entertain_cmd(u, u->thisorder);
-          break;
-
-        case K_WORK:
-          if (!rule_autowork && do_work(u, u->thisorder, nextworker)==0) {
-            ++nextworker;
-          }
-          break;
-
-        case K_TAX:
-          tax_cmd(u, u->thisorder, &taxorders);
-          break;
-
-        case K_STEAL:
-          steal_cmd(u, u->thisorder, &stealorders);
-          break;
-
-        case K_SPY:
-          spy_cmd(u, u->thisorder);
-          break;
-
-        case K_SABOTAGE:
-          sabotage_cmd(u, u->thisorder);
-          break;
-
-        case K_PLANT:
-        case K_BREED:
-          breed_cmd(u, u->thisorder);
-          break;
-
-        case K_RESEARCH:
-          research_cmd(u, u->thisorder);
-          break;
-      }
-    }
-
-    /* Entertainment (expandentertainment) und Besteuerung (expandtax) vor den
-    * Befehlen, die den Bauern mehr Geld geben, damit man aus den Zahlen der
-    * letzten Runde berechnen kann, wieviel die Bauern für Unterhaltung
-    * auszugeben bereit sind. */
-    if (entertaining) expandentertainment(r);
-    if (!rule_autowork) {
-      expandwork(r, workers, nextworker, maxworkingpeasants(r));
-    }
-    if (taxorders) expandtax(r, taxorders);
-
-    /* An erster Stelle Kaufen (expandbuying), die Bauern so Geld bekommen, um
-    * nachher zu beim Verkaufen (expandselling) den Spielern abkaufen zu
-    * können. */
-
-    if (buyorders) expandbuying(r, buyorders);
-
-    if (sellorders) {
-      int limit = rpeasants(r) / TRADE_FRACTION;
-      if (r->terrain == newterrain(T_DESERT) && buildingtype_exists(r, bt_find("caravan")))
-        limit *= 2;
-      expandselling(r, sellorders, limited?limit:INT_MAX);
-    }
-
-    /* Die Spieler sollen alles Geld verdienen, bevor sie beklaut werden
-    * (expandstealing). */
-
-    if (stealorders) expandstealing(r, stealorders);
-
-    assert(rmoney(r) >= 0);
-    assert(rpeasants(r) >= 0);
+  if (rule_taxation<0) {
+    rule_taxation = get_param_int(global.parameters, "rules.economy.taxation", 0);
+    rule_autowork = get_param_int(global.parameters, "work.auto", 0);
   }
+  
+  assert(rmoney(r) >= 0);
+  assert(rpeasants(r) >= 0);
+
+  if (r->land && rule_taxation==1) {
+    /* new taxation rules, region owners make money based on morale and building */
+    peasant_taxes(r);
+  }
+
+  buyorders = 0;
+  sellorders = 0;
+  working = 0;
+  nextentertainer = &entertainers[0];
+  entertaining = 0;
+  taxorders = 0;
+  stealorders = 0;
+
+  for (u = r->units; u; u = u->next) {
+    order * ord;
+    boolean trader = false;
+
+    if (u->race == new_race[RC_SPELL] || fval(u, UFL_LONGACTION))
+      continue;
+
+    if (u->race == new_race[RC_INSECT] && r_insectstalled(r) &&
+      !is_cursed(u->attribs, C_KAELTESCHUTZ,0))
+      continue;
+
+    if (fval(u, UFL_LONGACTION) && u->thisorder==NULL) {
+      cmistake(u, u->thisorder, 52, MSG_PRODUCE);
+      continue;
+    }
+
+    for (ord = u->orders;ord;ord=ord->next) {
+      switch (get_keyword(ord)) {
+      case K_BUY:
+        buy(u, &buyorders, ord);
+        trader = true;
+        break;
+      case K_SELL:
+        /* sell returns true if the sale is not limited
+         * by the region limit */
+        limited &= !sell(u, &sellorders, ord);
+        trader = true;
+        break;
+      }
+    }
+    if (trader) {
+      attrib * a = a_find(u->attribs, &at_trades);
+      if (a && a->data.i) {
+        produceexp(u, SK_TRADE, u->number);
+      }
+      fset(u, UFL_LONGACTION|UFL_NOTMOVING);
+      continue;
+    }
+
+    todo = get_keyword(u->thisorder);
+    if (todo == NOKEYWORD) continue;
+
+    if (fval(r->terrain, SEA_REGION) && u->race != new_race[RC_AQUARIAN]
+    && !(u->race->flags & RCF_SWIM)
+      && todo != K_STEAL && todo != K_SPY && todo != K_SABOTAGE)
+      continue;
+
+    switch (todo) {
+
+      case K_ENTERTAIN:
+        entertain_cmd(u, u->thisorder);
+        break;
+
+      case K_WORK:
+        if (!rule_autowork && do_work(u, u->thisorder, nextworker)==0) {
+          ++nextworker;
+        }
+        break;
+
+      case K_TAX:
+        tax_cmd(u, u->thisorder, &taxorders);
+        break;
+
+      case K_STEAL:
+        steal_cmd(u, u->thisorder, &stealorders);
+        break;
+
+      case K_SPY:
+        spy_cmd(u, u->thisorder);
+        break;
+
+      case K_SABOTAGE:
+        sabotage_cmd(u, u->thisorder);
+        break;
+
+      case K_PLANT:
+      case K_BREED:
+        breed_cmd(u, u->thisorder);
+        break;
+
+      case K_RESEARCH:
+        research_cmd(u, u->thisorder);
+        break;
+    }
+  }
+
+  /* Entertainment (expandentertainment) und Besteuerung (expandtax) vor den
+  * Befehlen, die den Bauern mehr Geld geben, damit man aus den Zahlen der
+  * letzten Runde berechnen kann, wieviel die Bauern für Unterhaltung
+  * auszugeben bereit sind. */
+  if (entertaining) expandentertainment(r);
+  if (!rule_autowork) {
+    expandwork(r, workers, nextworker, maxworkingpeasants(r));
+  }
+  if (taxorders) expandtax(r, taxorders);
+
+  /* An erster Stelle Kaufen (expandbuying), die Bauern so Geld bekommen, um
+  * nachher zu beim Verkaufen (expandselling) den Spielern abkaufen zu
+  * können. */
+
+  if (buyorders) expandbuying(r, buyorders);
+
+  if (sellorders) {
+    int limit = rpeasants(r) / TRADE_FRACTION;
+    if (r->terrain == newterrain(T_DESERT) && buildingtype_exists(r, bt_find("caravan")))
+      limit *= 2;
+    expandselling(r, sellorders, limited?limit:INT_MAX);
+  }
+
+  /* Die Spieler sollen alles Geld verdienen, bevor sie beklaut werden
+  * (expandstealing). */
+
+  if (stealorders) expandstealing(r, stealorders);
+
+  assert(rmoney(r) >= 0);
+  assert(rpeasants(r) >= 0);
 }
diff --git a/src/common/gamecode/economy.h b/src/common/gamecode/economy.h
index 06d3b2958..32e700bb0 100644
--- a/src/common/gamecode/economy.h
+++ b/src/common/gamecode/economy.h
@@ -46,7 +46,7 @@ extern int income(const struct unit * u);
 #define MAXNEWBIES								5
 
 void economics(struct region *r);
-void produce(void);
+void produce(struct region *r);
 void auto_work(struct region * r);
 
 enum { IC_WORK, IC_ENTERTAIN, IC_TAX, IC_TRADE, IC_TRADETAX, IC_STEAL, IC_MAGIC };
diff --git a/src/common/gamecode/laws.c b/src/common/gamecode/laws.c
index 36649116a..a828132b3 100644
--- a/src/common/gamecode/laws.c
+++ b/src/common/gamecode/laws.c
@@ -3962,10 +3962,8 @@ init_processor(void)
   add_proc_order(p, K_STUDY, &learn_cmd, PROC_THISORDER|PROC_LONGORDER, "Lernen");
 
   p+=10;
-
   add_proc_order(p, K_MAKE, &make_cmd, PROC_THISORDER|PROC_LONGORDER, "Produktion");
-  p+=10;
-  add_proc_global(p, &produce, "Arbeiten, Handel, Rekruten");
+  add_proc_postregion(p, &produce, "Arbeiten, Handel, Rekruten");
   add_proc_postregion(p, &split_allocations, "Produktion II");
 
   p+=10;
diff --git a/src/common/gamecode/report.c b/src/common/gamecode/report.c
index a41fa1dcd..89f3d89eb 100644
--- a/src/common/gamecode/report.c
+++ b/src/common/gamecode/report.c
@@ -1698,7 +1698,7 @@ list_address(FILE * F, const faction * uf, const faction_list * seenfactions)
       char buf[8192];
       char label = '-';
 
-      sprintf(buf, "%s: %s; %s", factionname(f), f->email, f->banner);
+      sprintf(buf, "%s: %s; %s", factionname(f), f->email, f->banner?f->banner:"");
       if (ALLIED(uf, f)) label = '*';
       else if (alliedfaction(NULL, uf, f, HELP_ALL)) label = '+';
       rparagraph(F, buf, 4, 0, label);
diff --git a/src/common/gamecode/study.c b/src/common/gamecode/study.c
index ecf34c4ba..4c5fa057c 100644
--- a/src/common/gamecode/study.c
+++ b/src/common/gamecode/study.c
@@ -74,8 +74,18 @@ getmagicskill(const struct locale * lang)
   variant token;
   const char * s = getstrtoken();
 
-  if (findtoken(tokens, s, &token)==E_TOK_SUCCESS) {
-    return (magic_t)token.i;
+  if (s && s[0]) {
+    if (findtoken(tokens, s, &token)==E_TOK_SUCCESS) {
+      return (magic_t)token.i;
+    } else {
+      char buffer[3];
+      buffer[0] = s[0];
+      buffer[1] = s[1];
+      buffer[2] = '\0';
+      if (findtoken(tokens, buffer, &token)==E_TOK_SUCCESS) {
+        return (magic_t)token.i;
+      }
+    }
   }
   return M_NONE;
 }
diff --git a/src/common/kernel/building.h b/src/common/kernel/building.h
index 8e46168ed..2775a2bbc 100644
--- a/src/common/kernel/building.h
+++ b/src/common/kernel/building.h
@@ -1,6 +1,6 @@
 /* vi: set ts=2:
  *
- *	Eressea PB(E)M host Copyright (C) 1998-2003
+ *  Eressea PB(E)M host Copyright (C) 1998-2003
  *      Christian Schlittchen (corwin@amber.kn-bremen.de)
  *      Katja Zedel (katze@felidae.kn-bremen.de)
  *      Henning Peters (faroul@beyond.kn-bremen.de)
@@ -23,8 +23,8 @@ extern "C" {
 
 /* maintenance::flags */
 #define MTF_NONE     0x00
-#define MTF_VARIABLE 0x01	/* resource usage scales with size */
-#define MTF_VITAL    0x02	/* if resource missing, building may crash */
+#define MTF_VARIABLE 0x01  /* resource usage scales with size */
+#define MTF_VITAL    0x02  /* if resource missing, building may crash */
 
 typedef struct maintenance {
   const struct resource_type * rtype; /* type of resource required */
@@ -44,25 +44,25 @@ typedef struct maintenance {
 #define BTF_NAMECHANGE    0x100 /* name and description can be changed more than once */
 
 typedef struct building_type {
-	const char * _name;
+  const char * _name;
 
-	int flags;  /* flags */
-	int capacity; /* Kapazität pro Größenpunkt */
-	int maxcapacity;  /* Max. Kapazität */
-	int maxsize;      /* how big can it get, with all the extensions? */
-	int magres;       /* how well it resists against spells */
-	int magresbonus;  /* bonus it gives the target against spells */
-	int fumblebonus;  /* bonus that reduces fumbling */
-	double auraregen; /* modifier for aura regeneration inside building */
-	struct maintenance * maintenance; /* array of requirements */
-	struct construction * construction; /* construction of 1 building-level */
+  int flags;  /* flags */
+  int capacity; /* Kapazität pro Größenpunkt */
+  int maxcapacity;  /* Max. Kapazität */
+  int maxsize;      /* how big can it get, with all the extensions? */
+  int magres;       /* how well it resists against spells */
+  int magresbonus;  /* bonus it gives the target against spells */
+  int fumblebonus;  /* bonus that reduces fumbling */
+  double auraregen; /* modifier for aura regeneration inside building */
+  struct maintenance * maintenance; /* array of requirements */
+  struct construction * construction; /* construction of 1 building-level */
 
-	const char * (*name)(const struct building_type*, int size);
-	void (*init)(struct building_type*);
-    void (*age)(struct building *);
-    int (*protection)(struct building *, struct unit *);
-    double (*taxes)(struct building *);
-	struct attrib * attribs;
+  const char * (*name)(const struct building_type*, int size);
+  void (*init)(struct building_type*);
+  void (*age)(struct building *);
+  int (*protection)(struct building *, struct unit *);
+  double (*taxes)(struct building *, int size);
+  struct attrib * attribs;
 } building_type;
 
 extern building_type * bt_find(const char* name);
@@ -90,19 +90,19 @@ extern int bt_effsize(const struct building_type * btype, int bsize);
 #define BLD_SAVEMASK       0x00 /* mask for persistent flags */
 
 typedef struct building {
-	struct building *next;
-	struct building *nexthash;
+  struct building *next;
+  struct building *nexthash;
 
-	const struct building_type * type;
-	struct region *region;
-	char *name;
-	char *display;
-	struct attrib * attribs;
-	int no;
-	int size;
-	int sizeleft;	/* is only used during battle. should be a temporary attribute */
-	int besieged;	/* should be an attribute */
-	unsigned int flags;
+  const struct building_type * type;
+  struct region *region;
+  char *name;
+  char *display;
+  struct attrib * attribs;
+  int no;
+  int size;
+  int sizeleft;  /* is only used during battle. should be a temporary attribute */
+  int besieged;  /* should be an attribute */
+  unsigned int flags;
 } building;
 
 typedef struct building_list {
diff --git a/src/common/kernel/xmlreader.c b/src/common/kernel/xmlreader.c
index fae566daf..9ce155b12 100644
--- a/src/common/kernel/xmlreader.c
+++ b/src/common/kernel/xmlreader.c
@@ -320,7 +320,7 @@ parse_buildings(xmlDocPtr doc)
           } else if (strcmp((const char*)propValue, "protection")==0) {
             btype->protection = (int (*)(struct building*, struct unit *))fun;
           } else if (strcmp((const char*)propValue, "taxes")==0) {
-            btype->taxes = (double (*)(struct building*))fun;
+            btype->taxes = (double (*)(struct building*, int))fun;
           } else if (strcmp((const char*)propValue, "age")==0) {
             btype->age = (void (*)(struct building*))fun;
           } else {
diff --git a/src/eressea/tolua/helpers.c b/src/eressea/tolua/helpers.c
index 4be67d700..54b16672f 100644
--- a/src/eressea/tolua/helpers.c
+++ b/src/eressea/tolua/helpers.c
@@ -448,9 +448,11 @@ lua_building_taxes(building * b)
   lua_rawget(L, LUA_GLOBALSINDEX);
   type=lua_type(L, 1);
   if (lua_isfunction(L, 1)) {
+    int level = buildingeffsize(b, false);
     tolua_pushusertype(L, (void *)b, TOLUA_CAST "building");
+    tolua_pushnumber(L, level);
 
-    if (lua_pcall(L, 1, 1, 0)!=0) {
+    if (lua_pcall(L, 2, 1, 0)!=0) {
       const char* error = lua_tostring(L, -1);
       log_error(("building_taxes(%s) calling '%s': %s.\n",
         buildingname(b), fname, error));
diff --git a/src/scripts/e3a/rules.lua b/src/scripts/e3a/rules.lua
index 5ee2a801d..f87eee5eb 100644
--- a/src/scripts/e3a/rules.lua
+++ b/src/scripts/e3a/rules.lua
@@ -31,18 +31,12 @@ function building_protection(b, u)
   return 1
 end
 
-function building_taxes(b)
+function building_taxes(b, blevel)
   btype = b.type
-  bsize = b.size
   if btype=="castle" then
-    if bsize>=6250 then return 0.05 end
-    if bsize>=1250 then return 0.04 end
-    if bsize>=250 then return 0.03 end
-    if bsize>=50 then return 0.02 end
-    if bsize>=10 then return 0.01 end
+    return blevel * 0.01
   elseif btype=="watch" then
-    if bsize>=10 then return 0.01 end
-    if bsize>=5 then return 0.005 end
+    return blevel * 0.005
   end
   return 0.0
 end