diff --git a/src/data/set.cpp b/src/data/set.cpp
index f85efda0..ce67cea5 100644
--- a/src/data/set.cpp
+++ b/src/data/set.cpp
@@ -129,7 +129,21 @@ ScriptValueP make_iterator(const Set& set) {
 }
 
 void mark_dependency_member(Set* value, const String& name, const Dependency& dep) {
-	// TODO
+	// is it the card list?
+	if (name == _("cards")) {
+		value->game->dependent_scripts_cards.push_back(dep);
+		return;
+	}
+	// is it the keywords?
+	if (name == _("keywords")) {
+		value->game->dependent_scripts_keywords.push_back(dep);
+		return;
+	}
+	// is it in the set data?
+	IndexMap<FieldP,ValueP>::const_iterator it = value->data.find(name);
+	if (it != value->data.end()) {
+		(*it)->fieldP->dependent_scripts.push_back(dep);
+	}
 }
 void mark_dependency_member(const SetP& value, const String& name, const Dependency& dep) {
 	mark_dependency_member(value.get(), name, dep);
@@ -157,6 +171,9 @@ int Set::positionOfCard(const CardP& card, const ScriptValueP& order_by) {
 	}
 	return order->find(card);
 }
+void Set::clearOrderCache() {
+	order_cache.clear();
+}
 
 // ----------------------------------------------------------------------------- : Styling
 
diff --git a/src/data/set.hpp b/src/data/set.hpp
index f162cbc5..cc3a6b98 100644
--- a/src/data/set.hpp
+++ b/src/data/set.hpp
@@ -93,6 +93,8 @@ class Set : public Packaged {
 	
 	/// Find the position of a card in this set, when the card list is sorted using the given cirterium
 	int positionOfCard(const CardP& card, const ScriptValueP& order_by);
+	/// Clear the order_cache used by positionOfCard
+	void clearOrderCache();
 	
   protected:
 	virtual String typeName() const;
diff --git a/src/script/dependency.hpp b/src/script/dependency.hpp
index 09de93e6..79ce6ef6 100644
--- a/src/script/dependency.hpp
+++ b/src/script/dependency.hpp
@@ -33,6 +33,11 @@ class Dependency {
 	DependencyType type   : 5;	///< Type of the dependent script
 	size_t         index  : 27;	///< index into an IndexMap
 	void*          data;		///< Extra pointer data
+	
+	/// This dependency, but dependent on all cards instead of just one
+	inline Dependency makeCardIndependend() const {
+		return Dependency(type == DEP_CARD_FIELD ? DEP_CARDS_FIELD : type, index, data);
+	}
 };
 
 // ----------------------------------------------------------------------------- : EOF
diff --git a/src/script/functions.cpp b/src/script/functions.cpp
index 70b2e42e..6f757a2f 100644
--- a/src/script/functions.cpp
+++ b/src/script/functions.cpp
@@ -8,6 +8,7 @@
 
 #include <script/value.hpp>
 #include <script/context.hpp>
+#include <script/dependency.hpp>
 #include <util/tagged_string.hpp>
 #include <data/set.hpp>
 #include <wx/regex.h>
@@ -421,18 +422,37 @@ int position_in_vector(const ScriptValueP& of, const ScriptValueP& in, const Scr
 }
 
 // finding positions, also of substrings
-SCRIPT_FUNCTION(position_of) {
+SCRIPT_FUNCTION_DEP(position_of) {
 	ScriptValueP of       = ctx.getVariable(_("of"));
 	ScriptValueP in       = ctx.getVariable(_("in"));
 	ScriptValueP order_by = ctx.getVariableOpt(_("order by"));
 	SCRIPT_RETURN(position_in_vector(of, in, order_by));
 }
 
+ScriptValueP ScriptBuildin_position_of::dependencies(Context& ctx, const Dependency& dep) const {
+	ScriptValueP of       = ctx.getVariable(_("of"));
+	ScriptValueP in       = ctx.getVariable(_("in"));
+	ScriptValueP order_by = ctx.getVariableOpt(_("order by"));
+	ScriptObject<Set*>*  s = dynamic_cast<ScriptObject<Set*>* >(in.get());
+	ScriptObject<CardP>* c = dynamic_cast<ScriptObject<CardP>*>(of.get());
+	if (s && c) {
+		// dependency on cards
+		mark_dependency_member(s->getValue(), _("cards"), dep);
+		if (order_by) {
+			// dependency on order_by function
+			order_by->dependencies(ctx, dep.makeCardIndependend());
+		}
+	}
+	return dependency_dummy;
+};
+
+
 // finding sizes
 SCRIPT_FUNCTION(number_of_items) {
 	SCRIPT_RETURN(ctx.getVariable(_("in"))->itemCount());
 }
 
+
 // ----------------------------------------------------------------------------- : Initialize functions
 
 void init_script_functions(Context& ctx) {
diff --git a/src/script/script_manager.cpp b/src/script/script_manager.cpp
index c1817fed..6ddf205a 100644
--- a/src/script/script_manager.cpp
+++ b/src/script/script_manager.cpp
@@ -99,6 +99,7 @@ void SetScriptManager::onInit(const StyleSheetP& stylesheet, Context* ctx) {
 		initDependencies(*ctx, *set.game);
 		initDependencies(*ctx, *stylesheet);
 		// apply scripts to everything
+		// TODO : don't updateAll here, it will be done repeatedly
 		updateAll();
 	} catch (Error e) {
 		handle_error(e, false, false);
@@ -195,7 +196,7 @@ void SetScriptManager::updateAllDependend(const vector<Dependency>& dependent_sc
 }
 
 void SetScriptManager::updateRecursive(deque<ToUpdate>& to_update, Age starting_age) {
-//	set->order_cache.clear(); // clear caches before evaluating a round of scripts
+	set.clearOrderCache(); // clear caches before evaluating a round of scripts
 	while (!to_update.empty()) {
 		updateToUpdate(to_update.front(), to_update, starting_age);
 		to_update.pop_front();
@@ -226,8 +227,10 @@ void SetScriptManager::alsoUpdate(deque<ToUpdate>& to_update, const vector<Depen
 				if (card) {
 					ValueP value = card->data.at(d.index);
 					to_update.push_back(ToUpdate(value.get(), card));
+					break;
+				} else {
+					// There is no card, so the update should affect all cards (fall through).
 				}
-				break;
 			} case DEP_CARDS_FIELD: {
 				// something invalidates a card value for all cards, so all cards need updating
 				FOR_EACH(card, set.cards) {
diff --git a/src/script/value.hpp b/src/script/value.hpp
index 20d65399..9a734126 100644
--- a/src/script/value.hpp
+++ b/src/script/value.hpp
@@ -314,16 +314,16 @@ inline ScriptValueP toScript(const shared_ptr<T>& v) { return new_intrusive1<Scr
  *   context.setVariable("my_function", script_my_function);
  *  @endcode
  */
-#define SCRIPT_FUNCTION(name) SCRIPT_FUNCTION_AUX(name,virtual)
+#define SCRIPT_FUNCTION(name) SCRIPT_FUNCTION_AUX(name,;)
 
 /// Macro to declare a new script function with custom dependency handling
-#define SCRIPT_FUNCTION_DEP(name) SCRIPT_FUNCTION_AUX(name,virtual) //TODO
+#define SCRIPT_FUNCTION_DEP(name) SCRIPT_FUNCTION_AUX(name, virtual ScriptValueP dependencies(Context&, const Dependency&) const;)
 
 // helper for SCRIPT_FUNCTION and SCRIPT_FUNCTION_DEP
 #define SCRIPT_FUNCTION_AUX(name,dep)							\
 		class ScriptBuildin_##name : public ScriptValue {		\
 			dep													\
-			/* virtual */ ScriptType type() const				\
+			virtual  ScriptType type() const					\
 				{ return SCRIPT_FUNCTION; }						\
 			virtual String typeName() const						\
 				{ return _("build in function '") _(#name) _("'"); }	\