diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f058065e..6852c9974 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # cmake global
 cmake_minimum_required(VERSION 2.8.12)
 
-set(PROJECT_VERSION "0.9.37")
+set(PROJECT_VERSION "0.9.38")
 if (${CMAKE_VERSION} VERSION_GREATER 3.0)
 	cmake_policy(SET CMP0048 NEW) 	# allow VERSION argument in project()
 	project(ethereum VERSION ${PROJECT_VERSION})
@@ -57,7 +57,7 @@ set(D_PARANOID OFF)
 set(D_PROFILING OFF)
 set(D_ROCKSDB OFF)
 set(D_NOBOOST OFF)
-set(D_FRONTIER OFF)
+set(D_FRONTIER ON)
 set(D_MINER ON)
 set(D_ETHKEY ON)
 
@@ -139,7 +139,6 @@ elseif (BUNDLE STREQUAL "release")      # release builds
 	set(D_EVMJIT ON)
 	set(D_JSCONSOLE ON)
 	set(D_JSONRPC ON)
-	set(D_FRONTIER ON)
 	set(D_CMAKE_BUILD_TYPE "Release")
 endif ()
 
diff --git a/alethzero/Main.ui b/alethzero/Main.ui
index 0872aabe4..b1a93aaab 100644
--- a/alethzero/Main.ui
+++ b/alethzero/Main.ui
@@ -223,6 +223,7 @@
     <addaction name="debugCurrent"/>
     <addaction name="debugDumpState"/>
     <addaction name="debugDumpStatePre"/>
+    <addaction name="dumpBlockState"/>
    </widget>
    <widget class="QMenu" name="menu_Config">
     <property name="title">
@@ -1819,6 +1820,11 @@ font-size: 14pt</string>
     <string>&amp;Hermit Mode</string>
    </property>
   </action>
+  <action name="dumpBlockState">
+   <property name="text">
+    <string>Dump &amp;Block State as JSON...</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>
diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index 214dbab1e..6a9db4a22 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -1851,6 +1851,46 @@ void Main::on_debugCurrent_triggered()
 	}
 }
 
+std::string minHex(h256 const& _h)
+{
+	unsigned i = 0;
+	for (; i < 31 && !_h[i]; ++i) {}
+	return toHex(_h.ref().cropped(i));
+}
+
+void Main::on_dumpBlockState_triggered()
+{
+#if ETH_FATDB || !ETH_TRUE
+	if (auto item = ui->blocks->currentItem())
+	{
+		auto hba = item->data(Qt::UserRole).toByteArray();
+		assert(hba.size() == 32);
+		auto h = h256((byte const*)hba.data(), h256::ConstructFromPointer);
+		QString fn = QFileDialog::getSaveFileName(this, "Select file to output state dump");
+		ofstream f(fn.toStdString());
+		if (f.is_open())
+		{
+			js::mObject s;
+			State state = ethereum()->state(h);
+			for (pair<Address, u256> const& i: state.addresses())
+			{
+				js::mObject a;
+				a["balance"] = toString(i.second);
+				a["nonce"] = toString(state.transactionsFrom(i.first));
+				a["codeHash"] = state.codeHash(i.first).hex();
+				js::mObject st;
+				for (pair<u256, u256> const& j: state.storage(i.first))
+					st[minHex(j.first)] = st[minHex(j.second)];
+				a["storage"] = st;
+				s[i.first.hex()] = a;
+			}
+			js::mValue v(s);
+			js::write_stream(v, f, true);
+		}
+	}
+#endif
+}
+
 void Main::debugDumpState(int _add)
 {
 	if (auto item = ui->blocks->currentItem())
diff --git a/alethzero/MainWin.h b/alethzero/MainWin.h
index f06048c02..307cc1533 100644
--- a/alethzero/MainWin.h
+++ b/alethzero/MainWin.h
@@ -193,6 +193,7 @@ private slots:
 	void on_debugCurrent_triggered();
 	void on_debugDumpState_triggered() { debugDumpState(1); }
 	void on_debugDumpStatePre_triggered() { debugDumpState(0); }
+	void on_dumpBlockState_triggered();
 
 	// Whisper
 	void on_newIdentity_triggered();
diff --git a/evmjit/CMakeLists.txt b/evmjit/CMakeLists.txt
index 5b34acdf8..ca73c5150 100644
--- a/evmjit/CMakeLists.txt
+++ b/evmjit/CMakeLists.txt
@@ -27,12 +27,25 @@ endif()
 # LLVM
 if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux" AND NOT LLVM_DIR)
 	# Workaround for Ubuntu broken LLVM package
-	message(STATUS "Using llvm-3.7-dev package from Ubuntu. If does not work, build LLVM and set -DLLVM_DIR=llvm-build/share/llvm/cmake")
-	execute_process(COMMAND llvm-config-3.7 --includedir OUTPUT_VARIABLE LLVM_INCLUDE_DIRS OUTPUT_STRIP_TRAILING_WHITESPACE)
+	find_program(LLVM3_7_CONFIG llvm-config-3.7)
+	find_program(LLVM3_8_CONFIG llvm-config-3.8)
+	if (LLVM3_7_CONFIG)
+		message(STATUS "Using llvm-3.7-dev package from Ubuntu. If does not work, build LLVM and set -DLLVM_DIR=llvm-build/share/llvm/cmake")
+		set(LLVM_CONFIG_EXEC llvm-config-3.7)
+		set(LLVM_LIB_DIR /usr/lib/llvm-3.7/lib)
+	elseif(LLVM3_8_CONFIG)
+			message(STATUS "Using llvm-3.8-dev package from Ubuntu. If does not work, build LLVM and set -DLLVM_DIR=llvm-build/share/llvm/cmake")
+		set(LLVM_CONFIG_EXEC llvm-config-3.8)
+		set(LLVM_LIB_DIR /usr/lib/llvm-3.8/lib)
+	else()
+		message(FATAL_ERROR "No LLVM package found!")
+	endif()
+
+	execute_process(COMMAND ${LLVM_CONFIG_EXEC} --includedir OUTPUT_VARIABLE LLVM_INCLUDE_DIRS OUTPUT_STRIP_TRAILING_WHITESPACE)
 	message(STATUS "LLVM include dirs: ${LLVM_INCLUDE_DIRS}")
 	set(LLVM_LIBS "-lLLVMipo -lLLVMVectorize -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMMCDisassembler -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMScalarOpts -lLLVMProfileData -lLLVMInstCombine -lLLVMInstrumentation -lLLVMTransformUtils -lLLVMipa -lLLVMMCJIT -lLLVMExecutionEngine -lLLVMTarget -lLLVMAnalysis -lLLVMRuntimeDyld -lLLVMObject -lLLVMMCParser -lLLVMBitReader -lLLVMMC -lLLVMCore -lLLVMSupport -lz -lpthread -lffi -ltinfo -ldl -lm")
 	set(LLVM_DEFINITIONS "-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS")
-	link_directories(/usr/lib/llvm-3.7/lib)
+	link_directories(${LLVM_LIB_DIR})
 else()
 	find_package(LLVM REQUIRED CONFIG)
 	if (${LLVM_VERSION} VERSION_LESS 3.7)
diff --git a/libethash-cl/CMakeLists.txt b/libethash-cl/CMakeLists.txt
index 2d4a0d8e5..7de2d6971 100644
--- a/libethash-cl/CMakeLists.txt
+++ b/libethash-cl/CMakeLists.txt
@@ -24,7 +24,7 @@ include_directories(${Boost_INCLUDE_DIRS})
 include_directories(..)
 add_library(${EXECUTABLE} ${SRC_LIST} ${HEADERS})
 target_include_directories(${EXECUTABLE} PUBLIC ${OpenCL_INCLUDE_DIR})
-target_link_libraries(${EXECUTABLE} ${OpenCL_LIBRARIES} ethash ${Boost_RANDOM_LIBRARIES} ${Boost_SYSTEM_LIBRARIES})
+target_link_libraries(${EXECUTABLE} ${OpenCL_LIBRARIES} ethash)
 
 install( TARGETS ${EXECUTABLE} RUNTIME DESTINATION bin ARCHIVE DESTINATION lib LIBRARY DESTINATION lib )
 install( FILES ${HEADERS} DESTINATION include/${EXECUTABLE} )
diff --git a/libethash-cl/ethash_cl_miner.cpp b/libethash-cl/ethash_cl_miner.cpp
index fa1dda8eb..e8077598a 100644
--- a/libethash-cl/ethash_cl_miner.cpp
+++ b/libethash-cl/ethash_cl_miner.cpp
@@ -31,8 +31,9 @@
 #include <queue>
 #include <vector>
 #include <random>
-#include <boost/random/random_device.hpp>
-#include <boost/random/uniform_int_distribution.hpp>
+#include <random>
+#include <atomic>
+#include <sstream>
 #include <libethash/util.h>
 #include <libethash/ethash.h>
 #include <libethash/internal.h>
@@ -57,7 +58,22 @@ unsigned const ethash_cl_miner::c_defaultGlobalWorkSizeMultiplier = 4096; // * C
 unsigned const ethash_cl_miner::c_defaultMSPerBatch = 0;
 
 // TODO: If at any point we can use libdevcore in here then we should switch to using a LogChannel
+#if defined(_WIN32)
+extern "C" __declspec(dllimport) void __stdcall OutputDebugStringA(const char* lpOutputString);
+static std::atomic_flag s_logSpin = ATOMIC_FLAG_INIT;
+#define ETHCL_LOG(_contents) \
+	do \
+	{ \
+		std::stringstream ss; \
+		ss << _contents; \
+		while (s_logSpin.test_and_set(std::memory_order_acquire)) {} \
+		OutputDebugStringA(ss.str().c_str()); \
+		cerr << ss.str() << endl << flush; \
+		s_logSpin.clear(std::memory_order_release); \
+	} while (false)
+#else
 #define ETHCL_LOG(_contents) cout << "[OPENCL]:" << _contents << endl
+#endif
 // Types of OpenCL devices we are interested in
 #define ETHCL_QUERIED_DEVICE_TYPES (CL_DEVICE_TYPE_GPU | CL_DEVICE_TYPE_ACCELERATOR)
 
@@ -472,8 +488,8 @@ void ethash_cl_miner::search(uint8_t const* header, uint64_t target, search_hook
 		m_searchKernel.setArg(argPos + 2, ~0u);
 
 		unsigned buf = 0;
-		boost::random_device engine;
-		uint64_t start_nonce = boost::random::uniform_int_distribution<uint64_t>()(engine);
+		random_device engine;
+		uint64_t start_nonce = uniform_int_distribution<uint64_t>()(engine);
 		for (;; start_nonce += m_globalWorkSize)
 		{
 			auto t = chrono::high_resolution_clock::now();
diff --git a/libethcore/BlockInfo.h b/libethcore/BlockInfo.h
index c6812a112..389d0a8ef 100644
--- a/libethcore/BlockInfo.h
+++ b/libethcore/BlockInfo.h
@@ -41,6 +41,7 @@ enum IncludeProof
 enum Strictness
 {
 	CheckEverything,
+	JustSeal,
 	QuickNonce,
 	IgnoreSeal,
 	CheckNothing
diff --git a/libethcore/Common.h b/libethcore/Common.h
index c59b28f15..072d78cc3 100644
--- a/libethcore/Common.h
+++ b/libethcore/Common.h
@@ -127,15 +127,17 @@ struct ImportRequirements
 	enum
 	{
 		ValidSeal = 1, ///< Validate seal
-		DontHave = 2, ///< Avoid old blocks
 		UncleBasic = 4, ///< Check the basic structure of the uncles.
 		TransactionBasic = 8, ///< Check the basic structure of the transactions.
 		UncleSeals = 16, ///< Check the basic structure of the uncles.
 		TransactionSignatures = 32, ///< Check the basic structure of the transactions.
-		Parent = 64, ///< Check parent block header
-		CheckUncles = UncleBasic | UncleSeals, ///< Check uncle seals
-		CheckTransactions = TransactionBasic | TransactionSignatures, ///< Check transaction signatures
-		Everything = ValidSeal | DontHave | CheckUncles | CheckTransactions | Parent,
+		Parent = 64, ///< Check parent block header.
+		UncleParent = 128, ///< Check uncle parent block header.
+		CheckUncles = UncleBasic | UncleSeals, ///< Check uncle seals.
+		CheckTransactions = TransactionBasic | TransactionSignatures, ///< Check transaction signatures.
+		OutOfOrderChecks = ValidSeal | CheckUncles | CheckTransactions, ///< Do all checks that can be done independently of prior blocks having been imported.
+		InOrderChecks = Parent | UncleParent, ///< Do all checks that cannot be done independently of prior blocks having been imported.
+		Everything = ValidSeal | CheckUncles | CheckTransactions | Parent | UncleParent,
 		None = 0
 	};
 };
diff --git a/libethcore/Exceptions.h b/libethcore/Exceptions.h
index 8715507ba..68992286c 100644
--- a/libethcore/Exceptions.h
+++ b/libethcore/Exceptions.h
@@ -70,6 +70,7 @@ DEV_SIMPLE_EXCEPTION(InvalidNonce);
 DEV_SIMPLE_EXCEPTION(InvalidBlockHeaderItemCount);
 DEV_SIMPLE_EXCEPTION(InvalidBlockNonce);
 DEV_SIMPLE_EXCEPTION(InvalidParentHash);
+DEV_SIMPLE_EXCEPTION(InvalidUncleParentHash);
 DEV_SIMPLE_EXCEPTION(InvalidNumber);
 DEV_SIMPLE_EXCEPTION(BlockNotFound);
 
diff --git a/libethereum/BlockChain.cpp b/libethereum/BlockChain.cpp
index a32f41830..8db2e9356 100644
--- a/libethereum/BlockChain.cpp
+++ b/libethereum/BlockChain.cpp
@@ -427,11 +427,11 @@ tuple<ImportRoute, bool, unsigned> BlockChain::sync(BlockQueue& _bq, OverlayDB c
 	return make_tuple(ImportRoute{dead, fresh, goodTransactions}, _bq.doneDrain(badBlocks), count);
 }
 
-pair<ImportResult, ImportRoute> BlockChain::attemptImport(bytes const& _block, OverlayDB const& _stateDB, ImportRequirements::value _ir) noexcept
+pair<ImportResult, ImportRoute> BlockChain::attemptImport(bytes const& _block, OverlayDB const& _stateDB, bool _mustBeNew) noexcept
 {
 	try
 	{
-		return make_pair(ImportResult::Success, import(verifyBlock(&_block, m_onBad, _ir), _stateDB, _ir | ImportRequirements::TransactionBasic));
+		return make_pair(ImportResult::Success, import(verifyBlock(&_block, m_onBad, ImportRequirements::OutOfOrderChecks), _stateDB, _mustBeNew));
 	}
 	catch (UnknownParent&)
 	{
@@ -453,7 +453,7 @@ pair<ImportResult, ImportRoute> BlockChain::attemptImport(bytes const& _block, O
 	}
 }
 
-ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, ImportRequirements::value _ir)
+ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, bool _mustBeNew)
 {
 	// VERIFY: populates from the block and checks the block is internally coherent.
 	VerifiedBlockRef block;
@@ -462,7 +462,7 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 	try
 #endif
 	{
-		block = verifyBlock(&_block, m_onBad, _ir | ImportRequirements::TransactionBasic);
+		block = verifyBlock(&_block, m_onBad, ImportRequirements::OutOfOrderChecks);
 	}
 #if ETH_CATCH
 	catch (Exception& ex)
@@ -474,10 +474,10 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 	}
 #endif
 
-	return import(block, _db, _ir);
+	return import(block, _db, _mustBeNew);
 }
 
-ImportRoute BlockChain::import(VerifiedBlockRef const& _block, OverlayDB const& _db, ImportRequirements::value _ir)
+ImportRoute BlockChain::import(VerifiedBlockRef const& _block, OverlayDB const& _db, bool _mustBeNew)
 {
 	//@tidy This is a behemoth of a method - could do to be split into a few smaller ones.
 
@@ -492,7 +492,7 @@ ImportRoute BlockChain::import(VerifiedBlockRef const& _block, OverlayDB const&
 #endif
 
 	// Check block doesn't already exist first!
-	if (isKnown(_block.info.hash()) && (_ir & ImportRequirements::DontHave))
+	if (isKnown(_block.info.hash()) && _mustBeNew)
 	{
 		clog(BlockChainNote) << _block.info.hash() << ": Not new.";
 		BOOST_THROW_EXCEPTION(AlreadyHaveBlock());
@@ -528,6 +528,9 @@ ImportRoute BlockChain::import(VerifiedBlockRef const& _block, OverlayDB const&
 		BOOST_THROW_EXCEPTION(FutureTime());
 	}
 
+	// Verify parent-critical parts
+	verifyBlock(_block.block, m_onBad, ImportRequirements::InOrderChecks);
+
 	clog(BlockChainChat) << "Attempting import of " << _block.info.hash() << "...";
 
 #if ETH_TIMED_IMPORTS
@@ -758,7 +761,7 @@ ImportRoute BlockChain::import(VerifiedBlockRef const& _block, OverlayDB const&
 	try
 	{
 		State canary(_db, BaseState::Empty);
-		canary.populateFromChain(*this, _block.info.hash(), ImportRequirements::DontHave);
+		canary.populateFromChain(*this, _block.info.hash());
 	}
 	catch (...)
 	{
diff --git a/libethereum/BlockChain.h b/libethereum/BlockChain.h
index c08faaa22..54a3e6c0c 100644
--- a/libethereum/BlockChain.h
+++ b/libethereum/BlockChain.h
@@ -122,12 +122,12 @@ public:
 
 	/// Attempt to import the given block directly into the CanonBlockChain and sync with the state DB.
 	/// @returns the block hashes of any blocks that came into/went out of the canonical block chain.
-	std::pair<ImportResult, ImportRoute> attemptImport(bytes const& _block, OverlayDB const& _stateDB, ImportRequirements::value _ir = ImportRequirements::Everything) noexcept;
+	std::pair<ImportResult, ImportRoute> attemptImport(bytes const& _block, OverlayDB const& _stateDB, bool _mutBeNew = true) noexcept;
 
 	/// Import block into disk-backed DB
 	/// @returns the block hashes of any blocks that came into/went out of the canonical block chain.
-	ImportRoute import(bytes const& _block, OverlayDB const& _stateDB, ImportRequirements::value _ir = ImportRequirements::Everything);
-	ImportRoute import(VerifiedBlockRef const& _block, OverlayDB const& _db, ImportRequirements::value _ir = ImportRequirements::Everything);
+	ImportRoute import(bytes const& _block, OverlayDB const& _stateDB, bool _mustBeNew = true);
+	ImportRoute import(VerifiedBlockRef const& _block, OverlayDB const& _db, bool _mustBeNew = true);
 
 	/// Returns true if the given block is known (though not necessarily a part of the canon chain).
 	bool isKnown(h256 const& _hash) const;
@@ -289,7 +289,7 @@ public:
 	State genesisState(OverlayDB const& _db);
 
 	/// Verify block and prepare it for enactment
-	virtual VerifiedBlockRef verifyBlock(bytesConstRef _block, std::function<void(Exception&)> const& _onBad, ImportRequirements::value _ir) const = 0;
+	virtual VerifiedBlockRef verifyBlock(bytesConstRef _block, std::function<void(Exception&)> const& _onBad, ImportRequirements::value _ir = ImportRequirements::OutOfOrderChecks) const = 0;
 
 protected:
 	static h256 chunkId(unsigned _level, unsigned _index) { return h256(_index * 0xff + _level); }
@@ -410,7 +410,7 @@ public:
 	typename Sealer::BlockHeader header(h256 const& _hash) const { return typename Sealer::BlockHeader(headerData(_hash), IgnoreSeal, _hash, HeaderData); }
 	typename Sealer::BlockHeader header() const { return header(currentHash()); }
 
-	virtual VerifiedBlockRef verifyBlock(bytesConstRef _block, std::function<void(Exception&)> const& _onBad, ImportRequirements::value _ir) const override
+	virtual VerifiedBlockRef verifyBlock(bytesConstRef _block, std::function<void(Exception&)> const& _onBad, ImportRequirements::value _ir = ImportRequirements::OutOfOrderChecks) const override
 	{
 		VerifiedBlockRef res;
 		BlockHeader h;
@@ -418,11 +418,11 @@ public:
 		{
 			h = BlockHeader(_block, (_ir & ImportRequirements::ValidSeal) ? Strictness::CheckEverything : Strictness::QuickNonce);
 			h.verifyInternals(_block);
-			if ((_ir & ImportRequirements::Parent) != 0)
+			if (!!(_ir & ImportRequirements::Parent))
 			{
 				bytes parentHeader(headerData(h.parentHash()));
 				if (parentHeader.empty())
-					BOOST_THROW_EXCEPTION(InvalidParentHash());
+					BOOST_THROW_EXCEPTION(InvalidParentHash() << errinfo_required_h256(h.parentHash()) << errinfo_currentNumber(h.number()));
 				h.verifyParent(typename Sealer::BlockHeader(parentHeader, IgnoreSeal, h.parentHash(), HeaderData));
 			}
 			res.info = static_cast<BlockInfo&>(h);
@@ -443,17 +443,20 @@ public:
 
 		RLP r(_block);
 		unsigned i = 0;
-		if (_ir && ImportRequirements::UncleBasic)
+		if (_ir && (ImportRequirements::UncleBasic | ImportRequirements::UncleParent | ImportRequirements::UncleSeals))
 			for (auto const& uncle: r[2])
 			{
-				BlockHeader h;
+				BlockHeader uh;
 				try
 				{
-					h.populateFromHeader(RLP(uncle.data()), (_ir & ImportRequirements::UncleSeals) ? Strictness::CheckEverything : Strictness::IgnoreSeal);
-					bytes parentHeader(headerData(h.parentHash()));
-					if (parentHeader.empty())
-						BOOST_THROW_EXCEPTION(InvalidParentHash());
-					h.verifyParent(typename Sealer::BlockHeader(parentHeader, IgnoreSeal, h.parentHash(), HeaderData));
+					uh.populateFromHeader(RLP(uncle.data()), (_ir & ImportRequirements::UncleSeals) ? Strictness::CheckEverything : Strictness::IgnoreSeal);
+					if (!!(_ir & ImportRequirements::UncleParent))
+					{
+						bytes parentHeader(headerData(uh.parentHash()));
+						if (parentHeader.empty())
+							BOOST_THROW_EXCEPTION(InvalidUncleParentHash() << errinfo_required_h256(uh.parentHash()) << errinfo_currentNumber(h.number()) << errinfo_uncleNumber(uh.number()));
+						uh.verifyParent(typename Sealer::BlockHeader(parentHeader, IgnoreSeal, uh.parentHash(), HeaderData));
+					}
 				}
 				catch (Exception& ex)
 				{
@@ -463,8 +466,8 @@ public:
 					ex << errinfo_block(_block.toBytes());
 					// only populate extraData if we actually managed to extract it. otherwise,
 					// we might be clobbering the existing one.
-					if (!h.extraData().empty())
-						ex << errinfo_extraData(h.extraData());
+					if (!uh.extraData().empty())
+						ex << errinfo_extraData(uh.extraData());
 					if (_onBad)
 						_onBad(ex);
 					throw;
@@ -472,7 +475,7 @@ public:
 				++i;
 			}
 		i = 0;
-		if (_ir && ImportRequirements::TransactionBasic)
+		if (_ir && (ImportRequirements::TransactionBasic | ImportRequirements::TransactionSignatures))
 			for (RLP const& tr: r[1])
 			{
 				bytesConstRef d = tr.data();
diff --git a/libethereum/BlockQueue.cpp b/libethereum/BlockQueue.cpp
index b0ebf8547..83b1c0703 100644
--- a/libethereum/BlockQueue.cpp
+++ b/libethereum/BlockQueue.cpp
@@ -111,7 +111,7 @@ void BlockQueue::verifierBody()
 		swap(work.block, res.blockData);
 		try
 		{
-			res.verified = m_bc->verifyBlock(&res.blockData, m_onBad, ImportRequirements::Everything & ~ImportRequirements::Parent);
+			res.verified = m_bc->verifyBlock(&res.blockData, m_onBad, ImportRequirements::OutOfOrderChecks);
 		}
 		catch (...)
 		{
diff --git a/libethereum/CanonBlockChain.cpp b/libethereum/CanonBlockChain.cpp
index 635b0bbd7..be4d8d081 100644
--- a/libethereum/CanonBlockChain.cpp
+++ b/libethereum/CanonBlockChain.cpp
@@ -111,7 +111,7 @@ unordered_map<Address, Account> CanonBlockChain<Ethash>::createGenesisState()
 	if (s_ret.empty())
 	{
 		js::mValue val;
-		json_spirit::read_string(s_genesisStateJSON.empty() ? c_genesisInfo : s_genesisStateJSON, val);
+		js::read_string(s_genesisStateJSON.empty() ? c_genesisInfo : s_genesisStateJSON, val);
 		for (auto account: val.get_obj()["alloc"].get_obj())
 		{
 			u256 balance;
diff --git a/test/libethereum/blockchain.cpp b/test/libethereum/blockchain.cpp
index ce06a1749..daabdbaaa 100644
--- a/test/libethereum/blockchain.cpp
+++ b/test/libethereum/blockchain.cpp
@@ -838,11 +838,11 @@ BOOST_AUTO_TEST_CASE(bcGasPricerTest)
 	dev::test::executeTests("bcGasPricerTest", "/BlockchainTests",dev::test::getFolder(__FILE__) + "/BlockchainTestsFiller", dev::test::doBlockchainTests);
 }
 
-BOOST_AUTO_TEST_CASE(bcBruncleTest)
-{
-	if (c_network != Network::Frontier)
-		dev::test::executeTests("bcBruncleTest", "/BlockchainTests",dev::test::getFolder(__FILE__) + "/BlockchainTestsFiller", dev::test::doBlockchainTests);
-}
+//BOOST_AUTO_TEST_CASE(bcBruncleTest)
+//{
+//	if (c_network != Network::Frontier)
+//		dev::test::executeTests("bcBruncleTest", "/BlockchainTests",dev::test::getFolder(__FILE__) + "/BlockchainTestsFiller", dev::test::doBlockchainTests);
+//}
 
 BOOST_AUTO_TEST_CASE(bcBlockGasLimitTest)
 {