diff --git a/ethchain/asm.go b/ethchain/asm.go
index 277326ff93..09d6af56fc 100644
--- a/ethchain/asm.go
+++ b/ethchain/asm.go
@@ -18,7 +18,7 @@ func Disassemble(script []byte) (asm []string) {
 		// Get the opcode (it must be an opcode!)
 		op := OpCode(val)
 
-		asm = append(asm, fmt.Sprintf("%v", op))
+		asm = append(asm, fmt.Sprintf("%04v: %v", pc, op))
 
 		switch op {
 		case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
@@ -28,7 +28,7 @@ func Disassemble(script []byte) (asm []string) {
 			if len(data) == 0 {
 				data = []byte{0}
 			}
-			asm = append(asm, fmt.Sprintf("0x%x", data))
+			asm = append(asm, fmt.Sprintf("%04v: 0x%x", pc, data))
 
 			pc.Add(pc, big.NewInt(a-1))
 		}
diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go
index f964e0e3af..05b2564cfd 100644
--- a/ethchain/block_chain.go
+++ b/ethchain/block_chain.go
@@ -176,18 +176,12 @@ func (bc *BlockChain) ResetTillBlockHash(hash []byte) error {
 		bc.LastBlockHash = bc.genesisBlock.Hash()
 		bc.LastBlockNumber = 1
 	} else {
-		// TODO: Somehow this doesn't really give the right numbers, double check.
-		// TODO: Change logs into debug lines
 		returnTo = bc.GetBlock(hash)
 		bc.CurrentBlock = returnTo
 		bc.LastBlockHash = returnTo.Hash()
-		//info := bc.BlockInfo(returnTo)
 		bc.LastBlockNumber = returnTo.Number.Uint64()
 	}
 
-	// XXX Why are we resetting? This is the block chain, it has nothing to do with states
-	//bc.Ethereum.StateManager().PrepareDefault(returnTo)
-
 	// Manually reset the last sync block
 	err := ethutil.Config.Db.Delete(lastBlock.Hash())
 	if err != nil {
@@ -233,6 +227,11 @@ func (bc *BlockChain) GetChainFromHash(hash []byte, max uint64) []interface{} {
 	for i := uint64(0); bytes.Compare(currentHash, hash) != 0 && num >= parentNumber && i < count; i++ {
 		// Get the block of the chain
 		block := bc.GetBlock(currentHash)
+		if block == nil {
+			chainlogger.Debugf("Unexpected error during GetChainFromHash: Unable to find %x\n", currentHash)
+			break
+		}
+
 		currentHash = block.PrevHash
 
 		chain = append(chain, block.Value().Val)
diff --git a/ethchain/vm.go b/ethchain/vm.go
index 4c1821f56d..20d355674c 100644
--- a/ethchain/vm.go
+++ b/ethchain/vm.go
@@ -102,22 +102,21 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 
 	vmlogger.Debugf("(~) %x gas: %v (d) %x\n", closure.object.Address(), closure.Gas, closure.Args)
 
-	// Memory for the current closure
-	mem := &Memory{}
-	// New stack (should this be shared?)
-	stack := NewStack()
-	require := func(m int) {
-		if stack.Len() < m {
-			isRequireError = true
-			panic(fmt.Sprintf("stack err = %d, req = %d", stack.Len(), m))
+	var (
+		op OpCode
+
+		mem      = &Memory{}
+		stack    = NewStack()
+		pc       = big.NewInt(0)
+		step     = 0
+		prevStep = 0
+		require  = func(m int) {
+			if stack.Len() < m {
+				isRequireError = true
+				panic(fmt.Sprintf("%04v (%v) stack err size = %d, required = %d", pc, op, stack.Len(), m))
+			}
 		}
-	}
-
-	// Program counter
-	pc := big.NewInt(0)
-	// Current step count
-	step := 0
-	prevStep := 0
+	)
 
 	for {
 		prevStep = step
@@ -128,7 +127,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 		// Get the memory location of pc
 		val := closure.Get(pc)
 		// Get the opcode (it must be an opcode!)
-		op := OpCode(val.Uint())
+		op = OpCode(val.Uint())
 
 		gas := new(big.Int)
 		addStepGasUsage := func(amount *big.Int) {
diff --git a/ethereum.go b/ethereum.go
index 28d1c04378..8caa75cbd4 100644
--- a/ethereum.go
+++ b/ethereum.go
@@ -342,7 +342,7 @@ func (s *Ethereum) Start(seed bool) {
 	// Bind to addr and port
 	ln, err := net.Listen("tcp", ":"+s.Port)
 	if err != nil {
-		ethlogger.Warnln("Connection listening disabled. Acting as client")
+		ethlogger.Warnf("Port %s in use. Connection listening disabled. Acting as client", s.Port)
 		s.listening = false
 	} else {
 		s.listening = true
diff --git a/ethutil/script.go b/ethutil/script.go
index 235498df25..af4ca6a387 100644
--- a/ethutil/script.go
+++ b/ethutil/script.go
@@ -22,7 +22,6 @@ func Compile(script string) (ret []byte, err error) {
 	} else {
 		compiler := mutan.NewCompiler(backend.NewEthereumBackend())
 		byteCode, errors := compiler.Compile(strings.NewReader(script))
-		//byteCode, errors := mutan.Compile(strings.NewReader(script), false)
 		if len(errors) > 0 {
 			var errs string
 			for _, er := range errors {
diff --git a/ethutil/trie.go b/ethutil/trie.go
index 18d0a5f0ae..0c1a6d2603 100644
--- a/ethutil/trie.go
+++ b/ethutil/trie.go
@@ -47,7 +47,7 @@ func (cache *Cache) Put(v interface{}) interface{} {
 	value := NewValue(v)
 
 	enc := value.Encode()
-	if len(enc) >= 32 {
+	if len(enc) < 32 {
 		sha := Sha3Bin(enc)
 
 		cache.nodes[string(sha)] = NewNode(sha, value, true)