diff --git a/alethzero/Transact.cpp b/alethzero/Transact.cpp
index f2a8ef0d5..1336c3f05 100644
--- a/alethzero/Transact.cpp
+++ b/alethzero/Transact.cpp
@@ -361,7 +361,7 @@ void Transact::rejigData()
 		to = m_context->fromString(ui->destination->currentText().toStdString()).first;
 		er = ethereum()->call(s, value(), to, m_data, gasNeeded, gasPrice());
 	}
-	gasNeeded = (qint64)(er.gasUsed + er.gasRefunded);
+	gasNeeded = (qint64)(er.gasUsed + er.gasRefunded + c_callStipend);
 	htmlInfo = QString("<div class=\"info\"><span class=\"icon\">INFO</span> Gas required: %1 total = %2 base, %3 exec [%4 refunded later]</div>").arg(gasNeeded).arg(baseGas).arg(gasNeeded - baseGas).arg((qint64)er.gasRefunded) + htmlInfo;
 
 	if (er.excepted != TransactionException::None)
diff --git a/libethcore/Ethash.cpp b/libethcore/Ethash.cpp
index 80550886c..fedf23826 100644
--- a/libethcore/Ethash.cpp
+++ b/libethcore/Ethash.cpp
@@ -317,7 +317,7 @@ void Ethash::GPUMiner::workLoop()
 			}
 			if (shouldStop())
 				return;
-			EthashAux::FullType dag = EthashAux::full(EthashAux::number(w.seedHash));
+			EthashAux::FullType dag = EthashAux::full(EthashAux::number(w.seedHash));		// todo , , false
 			bytesConstRef dagData = dag->data();
 			m_miner->init(dagData.data(), dagData.size(), 32, s_platformId, device);
 		}
diff --git a/libethcore/EthashAux.cpp b/libethcore/EthashAux.cpp
index 9287bcbfc..2f369c458 100644
--- a/libethcore/EthashAux.cpp
+++ b/libethcore/EthashAux.cpp
@@ -156,8 +156,10 @@ static int dagCallbackShim(unsigned _p)
 	return s_dagCallback ? s_dagCallback(_p) : 0;
 }
 
-EthashAux::FullType EthashAux::full(uint64_t _blockNumber, function<int(unsigned)> const& _f)
+EthashAux::FullType EthashAux::full(uint64_t _blockNumber, function<int(unsigned)> const& _f, bool _createIfMissing)
 {
+	(void)_createIfMissing;
+	// TODO: implement
 	auto l = light(_blockNumber);
 	h256 seedHash = EthashAux::seedHash(_blockNumber);
 	FullType ret;
@@ -195,7 +197,7 @@ unsigned EthashAux::computeFull(uint64_t _blockNumber)
 		get()->m_generatingFullNumber = _blockNumber / ETHASH_EPOCH_LENGTH * ETHASH_EPOCH_LENGTH;
 		get()->m_fullGenerator = unique_ptr<thread>(new thread([=](){
 			cnote << "Loading full DAG of" << _blockNumber;
-			get()->full(_blockNumber, [](unsigned p){ get()->m_fullProgress = p; return 0; });
+			get()->full(_blockNumber, [](unsigned p){ get()->m_fullProgress = p; return 0; }), true;
 			cnote << "Full DAG loaded";
 			get()->m_fullProgress = 0;
 			get()->m_generatingFullNumber = NotGenerating;
diff --git a/libethcore/EthashAux.h b/libethcore/EthashAux.h
index f57f7a4d3..bc87f9dff 100644
--- a/libethcore/EthashAux.h
+++ b/libethcore/EthashAux.h
@@ -73,8 +73,9 @@ public:
 	static unsigned computeFull(uint64_t _blockNumber);
 	/// Information on the generation progress.
 	static std::pair<uint64_t, unsigned> fullGeneratingProgress() { return std::make_pair(get()->m_generatingFullNumber, get()->m_fullProgress); }
-	/// Kicks off generation of DAG for @a _blocknumber and blocks until ready; @returns result.
-	static FullType full(uint64_t _blockNumber, std::function<int(unsigned)> const& _f = std::function<int(unsigned)>());
+
+	/// Kicks off generation of DAG for @a _blocknumber and blocks until ready; @returns result or empty pointer if not existing.
+	static FullType full(uint64_t _blockNumber, std::function<int(unsigned)> const& _f = std::function<int(unsigned)>(), bool _createIfMissing = false);
 
 	static Ethash::Result eval(BlockInfo const& _header) { return eval(_header, _header.nonce); }
 	static Ethash::Result eval(BlockInfo const& _header, Nonce const& _nonce);
@@ -83,6 +84,8 @@ public:
 private:
 	EthashAux() {}
 
+	/// Kicks off generation of DAG for @a _blocknumber and blocks until ready; @returns result.
+
 	void killCache(h256 const& _s);
 
 	static EthashAux* s_this;
diff --git a/libethereum/Executive.h b/libethereum/Executive.h
index 8903fd464..3806221be 100644
--- a/libethereum/Executive.h
+++ b/libethereum/Executive.h
@@ -137,7 +137,7 @@ private:
 	Transaction m_t;					///< The original transaction. Set by setup().
 	LogEntries m_logs;					///< The log entries created by this transaction. Set by finalize().
 
-	bigint m_gasRequired;
+	bigint m_gasRequired;				///< Gas required during execution of the transaction.
 	bigint m_gasCost;
 	bigint m_totalCost;
 };
diff --git a/libethereum/TransactionQueue.cpp b/libethereum/TransactionQueue.cpp
index 5aca67a29..11104705c 100644
--- a/libethereum/TransactionQueue.cpp
+++ b/libethereum/TransactionQueue.cpp
@@ -41,9 +41,14 @@ ImportResult TransactionQueue::import(bytesConstRef _transactionRLP, ImportCallb
 	if (ir != ImportResult::Success)
 		return ir;
 
-	Transaction t(_transactionRLP, CheckTransaction::Everything);
-	UpgradeGuard ul(l);
-	return manageImport_WITH_LOCK(h, t, _cb);
+	try {
+		Transaction t(_transactionRLP, CheckTransaction::Everything);
+		UpgradeGuard ul(l);
+		return manageImport_WITH_LOCK(h, t, _cb);
+	}
+	catch (...) {
+		return ImportResult::Malformed;
+	}
 }
 
 ImportResult TransactionQueue::check_WITH_LOCK(h256 const& _h, IfDropped _ik)
diff --git a/mix/qml/DeploymentDialog.qml b/mix/qml/DeploymentDialog.qml
index 1fbde3ac9..e2d15d487 100644
--- a/mix/qml/DeploymentDialog.qml
+++ b/mix/qml/DeploymentDialog.qml
@@ -300,8 +300,8 @@ Dialog {
 					{
 						Layout.preferredWidth: 350
 						id: registrarAddr
-						text: "ab69f864e49fc4294d18355c4bafb0b91b5e629b"
-						visible: false
+						text: "c6d9d2cd449a754c494264e1809c50e34d64562b"
+
 					}
 
 					DefaultLabel