diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index a44af8a2d..e15d08ab8 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -273,12 +273,12 @@ void Main::installWatches()
 
 Address Main::getNameReg() const
 {
-	return abiOut<Address>(ethereum()->call(c_newConfig, abiIn(1, (u256)1)));
+	return abiOut<Address>(ethereum()->call(c_newConfig, abiIn("lookup(uint256)", (u256)1)));
 }
 
 Address Main::getCurrencies() const
 {
-	return abiOut<Address>(ethereum()->call(c_newConfig, abiIn(1, (u256)2)));
+	return abiOut<Address>(ethereum()->call(c_newConfig, abiIn("lookup(uint256)", (u256)2)));
 }
 
 void Main::installNameRegWatch()
@@ -475,7 +475,7 @@ QString Main::pretty(dev::Address _a) const
 
 		if (g_newNameReg)
 		{
-			QString s = QString::fromStdString(toString(abiOut<string32>(ethereum()->call(g_newNameReg, abiIn(2, _a)))));
+			QString s = QString::fromStdString(toString(abiOut<string32>(ethereum()->call(g_newNameReg, abiIn("nameOf(address)", _a)))));
 //			s_memos[_a] = s;
 			if (s.size())
 				return s;
@@ -522,11 +522,11 @@ Address Main::fromString(QString const& _n) const
 	if (!s_memos.count(_n))
 	{*/
 //		if (!g_newNameReg)
-			auto g_newNameReg = abiOut<Address>(ethereum()->call(c_newConfig, abiIn(1, (u256)1)));
+			auto g_newNameReg = getNameReg();
 
 		if (g_newNameReg)
 		{
-			Address a = abiOut<Address>(ethereum()->call(g_newNameReg, abiIn(0, ::fromString(_n.toStdString()))));
+			Address a = abiOut<Address>(ethereum()->call(g_newNameReg, abiIn("addressOf(string32)", ::fromString(_n.toStdString()))));
 //			s_memos[_n] = a;
 			if (a)
 				return a;
diff --git a/libdevcore/vector_ref.h b/libdevcore/vector_ref.h
index 2771c739a..0cd3f8064 100644
--- a/libdevcore/vector_ref.h
+++ b/libdevcore/vector_ref.h
@@ -28,7 +28,7 @@ public:
 
 	bool contentsEqual(std::vector<mutable_value_type> const& _c) const { return _c.size() == m_count && !memcmp(_c.data(), m_data, m_count); }
 	std::vector<mutable_value_type> toVector() const { return std::vector<mutable_value_type>(m_data, m_data + m_count); }
-	std::vector<unsigned char> toBytes() const { return std::vector<unsigned char>((unsigned char const*)m_data, m_data + m_count * sizeof(_T)); }
+	std::vector<unsigned char> toBytes() const { return std::vector<unsigned char>((unsigned char const*)m_data, (unsigned char const*)m_data + m_count * sizeof(_T)); }
 	std::string toString() const { return std::string((char const*)m_data, ((char const*)m_data) + m_count * sizeof(_T)); }
 	template <class _T2> operator vector_ref<_T2>() const { assert(m_count * sizeof(_T) / sizeof(_T2) * sizeof(_T2) / sizeof(_T) == m_count); return vector_ref<_T2>((_T2*)m_data, m_count * sizeof(_T) / sizeof(_T2)); }
 
diff --git a/libethereum/Client.h b/libethereum/Client.h
index 6a3d7ec22..efe076dab 100644
--- a/libethereum/Client.h
+++ b/libethereum/Client.h
@@ -119,9 +119,9 @@ template <class T, class ... U> bytes abiInAux(T const& _t, U const& ... _u)
 	return ABISerialiser<T>::serialise(_t) + abiInAux(_u ...);
 }
 
-template <class ... T> bytes abiIn(byte _id, T const& ... _t)
+template <class ... T> bytes abiIn(std::string _id, T const& ... _t)
 {
-	return bytes(1, _id) + abiInAux(_t ...);
+	return sha3(_id).ref().cropped(0, 4).toBytes() + abiInAux(_t ...);
 }
 
 template <class T> struct ABIDeserialiser {};