diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index 61b5172bb..ff5208034 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -199,6 +199,8 @@ Main::Main(QWidget *parent) :
 	}
 #endif
 
+	cnote << "State root: " << BlockInfo::genesis().stateRoot;
+	cnote << "Genesis hash:" << sha3(BlockInfo::createGenesisBlock());
 	cnote << "Genesis RLP:" << toHex(BlockInfo::createGenesisBlock());
 
 	ui->configDock->close();
diff --git a/libethereum/BlockInfo.cpp b/libethereum/BlockInfo.cpp
index 089536170..d3a369c67 100644
--- a/libethereum/BlockInfo.cpp
+++ b/libethereum/BlockInfo.cpp
@@ -181,7 +181,7 @@ u256 BlockInfo::calculateGasLimit(BlockInfo const& _parent) const
 	if (!parentHash)
 		return 1000000;
 	else
-		return (_parent.gasLimit * (1024 - 1) + (_parent.gasUsed * 6 / 5)) / 1024;
+		return max<u256>(10000, (_parent.gasLimit * (1024 - 1) + (_parent.gasUsed * 6 / 5)) / 1024);
 }
 
 u256 BlockInfo::calculateDifficulty(BlockInfo const& _parent) const
diff --git a/libethereum/CommonEth.cpp b/libethereum/CommonEth.cpp
index ab07bfbec..d0a94d2e4 100644
--- a/libethereum/CommonEth.cpp
+++ b/libethereum/CommonEth.cpp
@@ -28,7 +28,7 @@ using namespace eth;
 
 //#define ETH_ADDRESS_DEBUG 1
 
-const unsigned eth::c_protocolVersion = 15;
+const unsigned eth::c_protocolVersion = 16;
 
 static const vector<pair<u256, string>> g_units =
 {
diff --git a/libethereum/State.cpp b/libethereum/State.cpp
index 19aec35b8..12ad7b6e5 100644
--- a/libethereum/State.cpp
+++ b/libethereum/State.cpp
@@ -47,6 +47,8 @@ std::map<Address, AddressState> const& eth::genesisState()
 		s_ret[Address(fromHex("e6716f9544a56c530d868e4bfbacb172315bdead"))] = AddressState(u256(1) << 200, 0, h256(), EmptySHA3);
 		s_ret[Address(fromHex("1e12515ce3e0f817a4ddef9ca55788a1d66bd2df"))] = AddressState(u256(1) << 200, 0, h256(), EmptySHA3);
 		s_ret[Address(fromHex("1a26338f0d905e295fccb71fa9ea849ffa12aaf4"))] = AddressState(u256(1) << 200, 0, h256(), EmptySHA3);
+		s_ret[Address(fromHex("2ef47100e0787b915105fd5e3f4ff6752079d5cb"))] = AddressState(u256(1) << 200, 0, h256(), EmptySHA3);
+		s_ret[Address(fromHex("cd2a3d9f938e13cd947ec05abc7fe734df8dd826"))] = AddressState(u256(1) << 200, 0, h256(), EmptySHA3);
 	}
 	return s_ret;
 }
@@ -82,10 +84,8 @@ State::State(Address _coinbaseAddress, Overlay const& _db):
 	m_state.init();
 	eth::commit(genesisState(), m_db, m_state);
 	m_db.commit();
-	cnote << "State root: " << m_state.root();
 
 	m_previousBlock = BlockInfo::genesis();
-	cnote << "Genesis hash:" << m_previousBlock.hash;
 	resetCurrent();
 
 	assert(m_state.root() == m_previousBlock.stateRoot);