diff --git a/data/en.mse-locale/locale b/data/en.mse-locale/locale
index b862e2fa..a4f4cdf1 100644
--- a/data/en.mse-locale/locale
+++ b/data/en.mse-locale/locale
@@ -229,6 +229,12 @@ help:
 	drag to move line:	Alt + drag to move curve;  double click to add a point on this line
 	drag to move point:	Click and drag to move control point;  double click to remove the point
 	
+	rotation:			Rotational symmetry (wheel)
+	reflection:			Reflectional symmetry (mirror)
+	add symmetry:		Add symmetries to the symbol
+	remove symmetry:	Remove this symmetry
+	copies:				Number of reflections (including the original)
+	
 	# Card select
 	filename format:	(Use {card.name} for the name of the card  ;  The filetype is determined based on the extension)
 
@@ -270,6 +276,8 @@ tool:
 	
 	rotation:			Rotation
 	reflection:			Reflection
+	add symmetry:		Add
+	remove symmetry:	Remove
 	
 	line segment:		Line
 	curve segment:		Curve
@@ -341,6 +349,8 @@ tooltip:
 	
 	rotation:			Rotational symmetry (wheel)
 	reflection:			Reflectional symmetry (mirror)
+	add symmetry:		Add symmetry to selected parts
+	remove symmetry:	Remove this symmetry
 	
 	line segment:		To straigt line
 	curve segment:		To curve
@@ -540,6 +550,14 @@ action:
 	delete point:		Delete point
 	delete points:		Delete points
 	
+	# Symmetry
+	add symmetry:			Add symmetry
+	remove symmetry:		Remove symmetry
+	move symmetry center:	Move symmetry center
+	move symmetry handle:	Change symmetry orientation
+	change symmetry type:	Change symmetry type
+	change symmetry copies:	Number of reflections
+	
 
 ############################################################## Error messages
 error:
@@ -601,6 +619,7 @@ error:
 type:
 	function:		function
 	collection:		collection
+	collection of:	collection of %ss
 	object:			object
 	real:			real number
 	integer:		integer number
@@ -610,6 +629,15 @@ type:
 	image:			image
 	nil:			nothing
 	
+	# Object types
+	game:			game
+	set:			set
+	stylesheet:		stylesheet
+	card:			card
+	field:			field
+	style:			style
+	value:			value
+	
 	# Symbol editor shapes
 	shape:			shape
 	shapes:			shapes
diff --git a/src/data/card.hpp b/src/data/card.hpp
index bce1b091..02f4bd70 100644
--- a/src/data/card.hpp
+++ b/src/data/card.hpp
@@ -83,6 +83,10 @@ class Card : public IntrusivePtrVirtualBase {
 	DECLARE_REFLECTION();
 };
 
+inline String type_name(const Card&) {
+	return _TYPE_("card");
+}
+
 void mark_dependency_member(const Card& value, const String& name, const Dependency& dep);
 
 // ----------------------------------------------------------------------------- : EOF
diff --git a/src/data/field.hpp b/src/data/field.hpp
index def5abcd..1543db9f 100644
--- a/src/data/field.hpp
+++ b/src/data/field.hpp
@@ -79,6 +79,10 @@ inline void update_index(FieldP& f, size_t index) {
 	f->index = index;
 }
 
+inline String type_name(const Field&) {
+	return _TYPE_("field");
+}
+
 // ----------------------------------------------------------------------------- : Style
 
 /// Style information needed to display a Value in a Field.
@@ -148,6 +152,10 @@ inline const FieldP& get_key     (const StyleP& s) { return s->fieldP; }
 inline const String& get_key_name(const StyleP& s) { return s->fieldP->name; }
 template <> StyleP read_new<Style>(Reader&);
 
+inline String type_name(const Style&) {
+	return _TYPE_("style");
+}
+
 void mark_dependency_member(const Style& style, const String& name, const Dependency& dep);
 
 // ----------------------------------------------------------------------------- : StyleListener
@@ -201,6 +209,10 @@ inline const FieldP& get_key     (const ValueP& v) { return v->fieldP; }
 inline const String& get_key_name(const ValueP& v) { return v->fieldP->name; }
 template <> ValueP read_new<Value>(Reader&);
 
+inline String type_name(const Value&) {
+	return _TYPE_("value");
+}
+
 // ----------------------------------------------------------------------------- : Utilities
 
 #define DECLARE_FIELD_TYPE(Type)														\
diff --git a/src/data/field/text.cpp b/src/data/field/text.cpp
index a45a472d..edf5164e 100644
--- a/src/data/field/text.cpp
+++ b/src/data/field/text.cpp
@@ -13,7 +13,7 @@
 // ----------------------------------------------------------------------------- : TextField
 
 TextField::TextField()
-	: multi_line(false), move_cursor_with_sort(false)
+	: multi_line(false)
 	, default_name(_("Default"))
 {}
 
@@ -35,7 +35,6 @@ IMPLEMENT_REFLECTION(TextField) {
 	REFLECT(multi_line);
 	REFLECT(script);
 	REFLECT_N("default", default_script);
-	REFLECT(move_cursor_with_sort);
 	REFLECT(default_name);
 }
 
diff --git a/src/data/field/text.hpp b/src/data/field/text.hpp
index acbd663a..ce0f1573 100644
--- a/src/data/field/text.hpp
+++ b/src/data/field/text.hpp
@@ -36,7 +36,6 @@ class TextField : public Field {
 	OptionalScript script;			///< Script to apply to all values
 	OptionalScript default_script;	///< Script that generates the default value
 	bool multi_line;				///< Are newlines allowed in the text?
-	bool move_cursor_with_sort;		///< When the text is reordered by a script should the cursor position be updated?
 	String default_name;			///< Name of "default" value
 	
 	virtual void initDependencies(Context&, const Dependency&) const;
diff --git a/src/data/game.hpp b/src/data/game.hpp
index 8d52515e..dfc8d1eb 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -72,5 +72,9 @@ class Game : public Packaged {
 	DECLARE_REFLECTION();
 };
 
+inline String type_name(const Game&) {
+	return _TYPE_("game");
+}
+
 // ----------------------------------------------------------------------------- : EOF
 #endif
diff --git a/src/data/set.hpp b/src/data/set.hpp
index 6774f5a8..425771c8 100644
--- a/src/data/set.hpp
+++ b/src/data/set.hpp
@@ -125,6 +125,9 @@ class Set : public Packaged {
 	map<ScriptValueP,OrderCacheP> order_cache;
 };
 
+inline String type_name(const Set&) {
+	return _TYPE_("set");
+}
 inline int item_count(const Set& set) {
 	return (int)set.cards.size();
 }
diff --git a/src/data/stylesheet.hpp b/src/data/stylesheet.hpp
index 2f9f75c8..e19f2e48 100644
--- a/src/data/stylesheet.hpp
+++ b/src/data/stylesheet.hpp
@@ -70,5 +70,9 @@ class StyleSheet : public Packaged {
 	DECLARE_REFLECTION();
 };
 
+inline String type_name(const StyleSheet&) {
+	return _TYPE_("stylesheet");
+}
+
 // ----------------------------------------------------------------------------- : EOF
 #endif
diff --git a/src/script/context.cpp b/src/script/context.cpp
index a6c08007..f0e6ab78 100644
--- a/src/script/context.cpp
+++ b/src/script/context.cpp
@@ -131,19 +131,7 @@ ScriptValueP Context::eval(const Script& script, bool useScope) {
 						const Instruction* instr_bt = script.backtraceSkip(instr - i.data - 2, i.data);
 						// have we have reached the name
 						if (instr_bt) {
-							if (instr_bt->instr == I_GET_VAR) {
-								throw ScriptError(e.what() + _("\n  in function: ") + variable_to_string(instr_bt->data));
-							} else if (instr_bt->instr == I_MEMBER_C) {
-								throw ScriptError(e.what() + _("\n  in function: ??\?.") + script.constants[instr_bt->data]->operator String());
-							} else if (instr_bt->instr == I_BINARY && instr_bt->instr2 == I_MEMBER) {
-								throw ScriptError(e.what() + _("\n  in function: ??\?[??\?]"));
-							} else if (instr_bt->instr == I_BINARY && instr_bt->instr2 == I_ADD) {
-								throw ScriptError(e.what() + _("\n  in function: ??? + ???"));
-							} else if (instr_bt->instr == I_NOP || instr_bt->instr == I_CALL) {
-								throw ScriptError(e.what() + _("\n  in function: ??\?(??\?)"));
-							} else {
-								throw ScriptError(e.what() + _("\n  in function: ??\?"));
-							}
+							throw ScriptError(e.what() + _("\n  in function: ") + script.instructionName(instr_bt));
 						} else {
 							throw e; // rethrow
 						}
diff --git a/src/script/script.cpp b/src/script/script.cpp
index 0946c7e9..4b25663e 100644
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -184,9 +184,13 @@ String Script::dumpInstr(unsigned int pos, Instruction i) const {
 // ----------------------------------------------------------------------------- : Backtracing
 
 const Instruction* Script::backtraceSkip(const Instruction* instr, int to_skip) const {
+	unsigned int initial = instr - &instructions[0];
 	for (;instr >= &instructions[0] && 
 	       (to_skip   || // we have something to skip
-	        instr >= &instructions[1] && (instr-1)->instr == I_JUMP // always look inside a jump
+	        instr >= &instructions[1] && (
+	              (instr-1)->instr == I_JUMP // always look inside a jump
+	           || (instr-1)->instr == I_NOP  // and skip nops
+	           )
 	       ) ; --instr) {
 		// skip an instruction
 		switch (instr->instr) {
@@ -205,6 +209,10 @@ const Instruction* Script::backtraceSkip(const Instruction* instr, int to_skip)
 				to_skip += 2 * instr->data - 1;
 				break;
 			case I_JUMP: {
+				if (instr->data > initial) {
+					// we were in an else branch all along, ignore this jump
+					return instr + 1;
+				}
 				// there will be a way not to take this jump
 				// the part in between will have no significant stack effect
 				unsigned int after_jump = instr + 1 - &instructions[0];
@@ -248,3 +256,24 @@ const Instruction* Script::backtraceSkip(const Instruction* instr, int to_skip)
 	}
 	return instr >= &instructions[0] ? instr : nullptr;
 }
+
+String Script::instructionName(const Instruction* instr) const {
+	if (instr < &instructions[0] || instr >= &instructions[instructions.size()]) return _("??\?");
+	if (instr->instr == I_GET_VAR) {
+		return variable_to_string(instr->data);
+	} else if (instr->instr == I_MEMBER_C) {
+		return instructionName(backtraceSkip(instr - 1, 0))
+		     + _(".")
+		     + constants[instr->data]->toString();
+	} else if (instr->instr == I_BINARY && instr->instr2 == I_MEMBER) {
+		throw _("??\?[...]");
+	} else if (instr->instr == I_BINARY && instr->instr2 == I_ADD) {
+		return _("??? + ???");
+	} else if (instr->instr == I_NOP) {
+		return _("??\?(...)");
+	} else if (instr->instr == I_CALL) {
+		return instructionName(backtraceSkip(instr - 1, instr->data)) + _("(...)");
+	} else {
+		return _("??\?");
+	}
+}
diff --git a/src/script/script.hpp b/src/script/script.hpp
index 915d6755..612f3fab 100644
--- a/src/script/script.hpp
+++ b/src/script/script.hpp
@@ -162,6 +162,8 @@ class Script : public ScriptValue {
 	 *  If the backtrace fails, returns nullptr
 	 */
 	const Instruction* backtraceSkip(const Instruction* instr, int to_skip) const;
+	/// Find the name of an instruction
+	String instructionName(const Instruction* instr) const;
 	
 	friend class Context;
 };
diff --git a/src/script/to_value.hpp b/src/script/to_value.hpp
index c5ada01b..2928a2dc 100644
--- a/src/script/to_value.hpp
+++ b/src/script/to_value.hpp
@@ -31,6 +31,14 @@ ScriptValueP make_iterator(const T& v) {
 template <typename T>
 void mark_dependency_member(const T& value, const String& name, const Dependency& dep) {}
 
+/// Type name of an object, for error messages
+template <typename T> inline String type_name(const T&) {
+	return _TYPE_("object");
+}
+template <typename K, typename V> inline String type_name(const pair<K,V>& p) {
+	return type_name(p.second); // for maps
+}
+
 // ----------------------------------------------------------------------------- : Errors
 
 /// A delayed error message.
@@ -104,7 +112,7 @@ class ScriptCollection : public ScriptValue {
   public:
 	inline ScriptCollection(const Collection* v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_COLLECTION; }
-	virtual String typeName() const { return _TYPE_("collection"); }
+	virtual String typeName() const { return format_string(_TYPE_("collection"), type_name(*value->begin())); }
 	virtual ScriptValueP getMember(const String& name) const {
 		long index;
 		if (name.ToLong(&index) && index >= 0 && (size_t)index < value->size()) {
@@ -152,7 +160,7 @@ class ScriptMap : public ScriptValue {
   public:
 	inline ScriptMap(const Collection* v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_COLLECTION; }
-	virtual String typeName() const { return _TYPE_("collection"); }
+	virtual String typeName() const { return format_string(_TYPE_("collection"), type_name(value->begin())); }
 	virtual ScriptValueP getMember(const String& name) const {
 		return get_member(*value, name);
 	}
@@ -195,7 +203,7 @@ class ScriptObject : public ScriptValue {
   public:
 	inline ScriptObject(const T& v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_OBJECT; }
-	virtual String typeName() const { return _TYPE_("object"); }
+	virtual String typeName() const { return type_name(*value); }
 	virtual operator String() const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator String(); }
 	virtual operator double() const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator double(); }
 	virtual operator int()    const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator int(); }