diff --git a/core/block_processor.go b/core/block_processor.go
index 2dcaa37c21..4d5cd94c9a 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -219,7 +219,7 @@ func (sm *BlockProcessor) ProcessWithParent(block, parent *types.Block) (td *big
 
 	// Calculate the td for this block
 	td = CalculateTD(block, parent)
-	// Sync the current block's state to the database and cancelling out the deferred Undo
+	// Sync the current block's state to the database
 	state.Sync()
 	// Set the block hashes for the current messages
 	state.Manifest().SetHash(block.Hash())
diff --git a/core/genesis.go b/core/genesis.go
index 6d4eeba728..c870ce61e1 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -32,7 +32,6 @@ func GenesisBlock(db ethutil.Database) *types.Block {
 	genesis.SetReceipts(types.Receipts{})
 
 	statedb := state.New(genesis.Root(), db)
-	//statedb := state.New(genesis.Trie())
 	for _, addr := range []string{
 		"dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6",
 		"e4157b34ea9615cfbde6b4fda419828124b70c78",
diff --git a/core/state_transition.go b/core/state_transition.go
index 00d9d486af..33dd45f023 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -186,7 +186,7 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 		return
 	}
 
-	stateCopy := self.env.State().Copy()
+	//stateCopy := self.env.State().Copy()
 	vmenv := self.env
 	var ref vm.ContextRef
 	if MessageCreatesContract(msg) {
@@ -200,29 +200,33 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 			}
 		}
 
-		if vmenv, ok := vmenv.(*VMEnv); ok && tryJit {
-			statelogger.Infof("CREATE: re-running using JIT (PH=%x)\n", stateCopy.Root()[:4])
-			// re-run using the JIT (validation for the JIT)
-			goodState := vmenv.State().Copy()
-			vmenv.state = stateCopy
-			vmenv.SetVmType(vm.JitVmTy)
-			vmenv.Create(sender, contract.Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
-			statelogger.Infof("DONE PH=%x STD_H=%x JIT_H=%x\n", stateCopy.Root()[:4], goodState.Root()[:4], vmenv.State().Root()[:4])
-			self.state.Set(goodState)
-		}
+		/*
+			if vmenv, ok := vmenv.(*VMEnv); ok && tryJit {
+				statelogger.Infof("CREATE: re-running using JIT (PH=%x)\n", stateCopy.Root()[:4])
+				// re-run using the JIT (validation for the JIT)
+				goodState := vmenv.State().Copy()
+				vmenv.state = stateCopy
+				vmenv.SetVmType(vm.JitVmTy)
+				vmenv.Create(sender, contract.Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
+				statelogger.Infof("DONE PH=%x STD_H=%x JIT_H=%x\n", stateCopy.Root()[:4], goodState.Root()[:4], vmenv.State().Root()[:4])
+				self.state.Set(goodState)
+			}
+		*/
 	} else {
 		ret, err = vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
 
-		if vmenv, ok := vmenv.(*VMEnv); ok && tryJit {
-			statelogger.Infof("CALL: re-running using JIT (PH=%x)\n", stateCopy.Root()[:4])
-			// re-run using the JIT (validation for the JIT)
-			goodState := vmenv.State().Copy()
-			vmenv.state = stateCopy
-			vmenv.SetVmType(vm.JitVmTy)
-			vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
-			statelogger.Infof("DONE PH=%x STD_H=%x JIT_H=%x\n", stateCopy.Root()[:4], goodState.Root()[:4], vmenv.State().Root()[:4])
-			self.state.Set(goodState)
-		}
+		/*
+			if vmenv, ok := vmenv.(*VMEnv); ok && tryJit {
+				statelogger.Infof("CALL: re-running using JIT (PH=%x)\n", stateCopy.Root()[:4])
+				// re-run using the JIT (validation for the JIT)
+				goodState := vmenv.State().Copy()
+				vmenv.state = stateCopy
+				vmenv.SetVmType(vm.JitVmTy)
+				vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
+				statelogger.Infof("DONE PH=%x STD_H=%x JIT_H=%x\n", stateCopy.Root()[:4], goodState.Root()[:4], vmenv.State().Root()[:4])
+				self.state.Set(goodState)
+			}
+		*/
 	}
 
 	if err != nil {
diff --git a/eth/block_pool.go b/eth/block_pool.go
index 97ae683c16..13016c694d 100644
--- a/eth/block_pool.go
+++ b/eth/block_pool.go
@@ -636,12 +636,12 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
 
 		// validate block for PoW
 		if !self.verifyPoW(block) {
-			poolLogger.Warnf("invalid pow on block [%s] by peer %s", name(hash), peerId)
+			poolLogger.Warnf("invalid pow on block [%s %v] by peer %s", name(hash), block.Number(), peerId)
 			self.peerError(peerId, ErrInvalidPoW, "%x", hash)
 			return
 		}
 	}
-	poolLogger.Debugf("added block [%s] sent by peer %s", name(hash), peerId)
+	poolLogger.DebugDetailf("added block [%s] sent by peer %s", name(hash), peerId)
 	node.block = block
 	node.blockBy = peerId