diff --git a/README.md b/README.md
index 685d4c6d9..7337f9a3c 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Ethereum
 
 Ethereum Go Client © 2014 Jeffrey Wilcke.
 
-Current state: Proof of Concept 5.0 RC3.
+Current state: Proof of Concept 5.0 RC6.
 
 For the development package please see the [eth-go package](https://github.com/ethereum/eth-go).
 
diff --git a/ethereal/assets/muted/index.html b/ethereal/assets/muted/index.html
index 84584e373..14949b5ac 100644
--- a/ethereal/assets/muted/index.html
+++ b/ethereal/assets/muted/index.html
@@ -46,6 +46,7 @@
 
     .CodeMirror {
         height: 70%;
+	font-size: 14pt;
     }
 </style>
 </head>
diff --git a/ethereal/assets/qml/newTransaction/_new_contract.qml b/ethereal/assets/qml/newTransaction/_new_contract.qml
index f8f3d53a0..e3c7229eb 100644
--- a/ethereal/assets/qml/newTransaction/_new_contract.qml
+++ b/ethereal/assets/qml/newTransaction/_new_contract.qml
@@ -61,7 +61,7 @@ Component {
 			id: txValue
 			width: 200
 			placeholderText: "Amount"
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			onTextChanged: {
 				contractFormReady()
 			}
@@ -69,7 +69,7 @@ Component {
 		TextField {
 			id: txGas
 			width: 200
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			placeholderText: "Gas"
 			onTextChanged: {
 				contractFormReady()
@@ -79,7 +79,7 @@ Component {
 			id: txGasPrice
 			width: 200
 			placeholderText: "Gas price"
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			onTextChanged: {
 				contractFormReady()
 			}
diff --git a/ethereal/assets/qml/newTransaction/_simple_send.qml b/ethereal/assets/qml/newTransaction/_simple_send.qml
index 12420c15a..cd1ef55b6 100644
--- a/ethereal/assets/qml/newTransaction/_simple_send.qml
+++ b/ethereal/assets/qml/newTransaction/_simple_send.qml
@@ -56,9 +56,10 @@ Component {
 		}
 		TextField {
 			id: txSimpleValue
+			width: 200
 			placeholderText: "Amount"
 			anchors.rightMargin: 5
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			onTextChanged: { checkFormState() }
 		}
 		Button {
diff --git a/ethereal/assets/samplecoin/samplecoin.html b/ethereal/assets/samplecoin/samplecoin.html
index 384936780..3f8eacc00 100644
--- a/ethereal/assets/samplecoin/samplecoin.html
+++ b/ethereal/assets/samplecoin/samplecoin.html
@@ -9,7 +9,7 @@
 
 <script type="text/javascript">
 
-var jefcoinAddr = "b7cb72c47ec4f31751d0d628b5a33fd6671bbba0"
+var jefcoinAddr = "681fd48ffa236549fbcd16bdf9f98bb541a7f742"
 var mAddr = ""
 
 function createTransaction() {
@@ -23,8 +23,6 @@ function createTransaction() {
 }
 
 function init() {
-	eth.set({width: 500});
-
 	eth.getKey(function(sec) {
 		mAddr = sec;
 		eth.getSecretToAddress(sec, function(addr) {
diff --git a/ethereal/ethereum.go b/ethereal/ethereum.go
index 15a454bdf..98fab18e3 100644
--- a/ethereal/ethereum.go
+++ b/ethereal/ethereum.go
@@ -4,8 +4,6 @@ import (
 	"fmt"
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
-	"github.com/ethereum/eth-go/ethpub"
-	"github.com/ethereum/eth-go/ethrpc"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/ethereal/ui"
 	"github.com/ethereum/go-ethereum/utils"
@@ -89,8 +87,19 @@ func main() {
 	}
 
 	if ExportKey {
-		key := ethutil.Config.Db.GetKeys()[0]
-		fmt.Printf("%x\n", key.PrivateKey)
+		keyPair := ethutil.GetKeyRing().Get(0)
+		fmt.Printf(`
+Generating new address and keypair.
+Please keep your keys somewhere save.
+
+++++++++++++++++ KeyRing +++++++++++++++++++
+addr: %x
+prvk: %x
+pubk: %x
+++++++++++++++++++++++++++++++++++++++++++++
+save these words so you can restore your account later: %s
+`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
+
 		os.Exit(0)
 	}
 
@@ -99,13 +108,12 @@ func main() {
 		os.Exit(0)
 	}
 
+	if StartMining {
+		utils.DoMining(ethereum)
+	}
+
 	if StartRpc {
-		ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
-		if err != nil {
-			log.Println("Could not start RPC interface:", err)
-		} else {
-			go ethereum.RpcServer.Start()
-		}
+		utils.DoRpc(ethereum, RpcPort)
 	}
 
 	log.Printf("Starting Ethereum GUI v%s\n", ethutil.Config.Ver)
diff --git a/ethereal/ui/gui.go b/ethereal/ui/gui.go
index 7f84272d6..aa0364998 100644
--- a/ethereal/ui/gui.go
+++ b/ethereal/ui/gui.go
@@ -42,15 +42,11 @@ func New(ethereum *eth.Ethereum) *Gui {
 		panic(err)
 	}
 
-	data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
 	// On first run we won't have any keys yet, so this would crash.
 	// Therefor we check if we are ready to actually start this process
 	var addr []byte
-	if len(data) > 0 {
-		key := ethutil.Config.Db.GetKeys()[0]
-		addr = key.Address()
-
-		//ethereum.StateManager().WatchAddr(addr)
+	if ethutil.GetKeyRing().Len() != 0 {
+		addr = ethutil.GetKeyRing().Get(0).Address()
 	}
 
 	pub := ethpub.NewPEthereum(ethereum)
@@ -59,6 +55,8 @@ func New(ethereum *eth.Ethereum) *Gui {
 }
 
 func (gui *Gui) Start(assetPath string) {
+	const version = "0.5.0 RC6"
+
 	defer gui.txDb.Close()
 
 	// Register ethereum functions
@@ -68,7 +66,7 @@ func (gui *Gui) Start(assetPath string) {
 		Init: func(p *ethpub.PTx, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
 	}})
 
-	ethutil.Config.SetClientString(fmt.Sprintf("/Ethereal v%s", "0.5.0 RC4"))
+	ethutil.Config.SetClientString(fmt.Sprintf("/Ethereal v%s", version))
 	ethutil.Config.Log.Infoln("[GUI] Starting GUI")
 	// Create a new QML engine
 	gui.engine = qml.NewEngine()
@@ -81,43 +79,6 @@ func (gui *Gui) Start(assetPath string) {
 
 	// Load the main QML interface
 	data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
-	/*
-		var err error
-		var component qml.Object
-		firstRun := len(data) == 0
-
-		if firstRun {
-			component, err = gui.engine.LoadFile(uiLib.AssetPath("qml/first_run.qml"))
-		} else {
-			component, err = gui.engine.LoadFile(uiLib.AssetPath("qml/wallet.qml"))
-		}
-		if err != nil {
-			ethutil.Config.Log.Infoln("FATAL: asset not found: you can set an alternative asset path on on the command line using option 'asset_path'")
-
-			panic(err)
-		}
-
-		gui.win = component.CreateWindow(nil)
-		uiLib.win = gui.win
-		db := &Debugger{gui.win, make(chan bool)}
-		gui.lib.Db = db
-		uiLib.Db = db
-
-		// Add the ui as a log system so we can log directly to the UGI
-		ethutil.Config.Log.AddLogSystem(gui)
-
-		// Loads previous blocks
-		if firstRun == false {
-			go gui.setInitialBlockChain()
-			go gui.readPreviousTransactions()
-			go gui.update()
-		}
-
-		gui.win.Show()
-		gui.win.Wait()
-
-		gui.eth.Stop()
-	*/
 
 	var win *qml.Window
 	var err error
@@ -199,8 +160,29 @@ func (gui *Gui) processBlock(block *ethchain.Block) {
 	gui.win.Root().Call("addBlock", ethpub.NewPBlock(block))
 }
 
+func (gui *Gui) setWalletValue(amount, unconfirmedFunds *big.Int) {
+	var str string
+	if unconfirmedFunds != nil {
+		pos := "+"
+		if unconfirmedFunds.Cmp(big.NewInt(0)) >= 0 {
+			pos = "-"
+		}
+		val := ethutil.CurrencyToString(new(big.Int).Abs(ethutil.BigCopy(unconfirmedFunds)))
+		str = fmt.Sprintf("%v (%s %v)", ethutil.CurrencyToString(amount), pos, val)
+	} else {
+		str = fmt.Sprintf("%v", ethutil.CurrencyToString(amount))
+	}
+
+	gui.win.Root().Call("setWalletValue", str)
+}
+
 // Simple go routine function that updates the list of peers in the GUI
 func (gui *Gui) update() {
+	blockChan := make(chan ethutil.React, 1)
+	reactor := gui.eth.Reactor()
+
+	reactor.Subscribe("newBlock", blockChan)
+
 	txChan := make(chan ethchain.TxMsg, 1)
 	gui.eth.TxPool().Subscribe(txChan)
 
@@ -211,6 +193,12 @@ func (gui *Gui) update() {
 
 	for {
 		select {
+		case b := <-blockChan:
+			block := b.Resource.(*ethchain.Block)
+			if bytes.Compare(block.Coinbase, gui.addr) == 0 {
+				gui.setWalletValue(gui.eth.StateManager().ProcState().GetAccount(gui.addr).Amount, nil)
+			}
+
 		case txMsg := <-txChan:
 			tx := txMsg.Tx
 
@@ -232,14 +220,7 @@ func (gui *Gui) update() {
 					unconfirmedFunds.Add(unconfirmedFunds, tx.Value)
 				}
 
-				pos := "+"
-				if unconfirmedFunds.Cmp(big.NewInt(0)) >= 0 {
-					pos = "-"
-				}
-				val := ethutil.CurrencyToString(new(big.Int).Abs(ethutil.BigCopy(unconfirmedFunds)))
-				str := fmt.Sprintf("%v (%s %v)", ethutil.CurrencyToString(object.Amount), pos, val)
-
-				gui.win.Root().Call("setWalletValue", str)
+				gui.setWalletValue(object.Amount, unconfirmedFunds)
 			} else {
 				object := state.GetAccount(gui.addr)
 				if bytes.Compare(tx.Sender(), gui.addr) == 0 {
@@ -248,7 +229,7 @@ func (gui *Gui) update() {
 					object.AddAmount(tx.Value)
 				}
 
-				gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(object.Amount)))
+				gui.setWalletValue(object.Amount, nil)
 
 				state.SetStateObject(object)
 			}
@@ -274,13 +255,13 @@ func (gui *Gui) Printf(format string, v ...interface{}) {
 }
 
 func (gui *Gui) Transact(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) {
-	keyPair := ethutil.Config.Db.GetKeys()[0]
+	keyPair := ethutil.GetKeyRing().Get(0)
 
 	return gui.pub.Transact(ethutil.Hex(keyPair.PrivateKey), recipient, value, gas, gasPrice, data)
 }
 
 func (gui *Gui) Create(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) {
-	keyPair := ethutil.Config.Db.GetKeys()[0]
+	keyPair := ethutil.GetKeyRing().Get(0)
 
 	mainInput, initInput := mutan.PreParse(data)
 
diff --git a/ethereal/ui/library.go b/ethereal/ui/library.go
index c889efb45..267108195 100644
--- a/ethereal/ui/library.go
+++ b/ethereal/ui/library.go
@@ -34,10 +34,13 @@ func (lib *EthLib) ImportAndSetPrivKey(privKey string) bool {
 }
 
 func (lib *EthLib) CreateAndSetPrivKey() (string, string, string, string) {
-	pub, prv := secp256k1.GenerateKeyPair()
-	pair := &ethutil.Key{PrivateKey: prv, PublicKey: pub}
-	ethutil.Config.Db.Put([]byte("KeyRing"), pair.RlpEncode())
-	mne := ethutil.MnemonicEncode(ethutil.Hex(prv))
+	_, prv := secp256k1.GenerateKeyPair()
+	keyPair, err := ethutil.GetKeyRing().NewKeyPair(prv)
+	if err != nil {
+		panic(err)
+	}
+
+	mne := ethutil.MnemonicEncode(ethutil.Hex(keyPair.PrivateKey))
 	mnemonicString := strings.Join(mne, " ")
-	return mnemonicString, fmt.Sprintf("%x", pair.Address()), fmt.Sprintf("%x", prv), fmt.Sprintf("%x", pub)
+	return mnemonicString, fmt.Sprintf("%x", keyPair.Address()), ethutil.Hex(keyPair.PrivateKey), ethutil.Hex(keyPair.PublicKey)
 }
diff --git a/ethereal/ui/ui_lib.go b/ethereal/ui/ui_lib.go
index 6736e79ae..0c43f1675 100644
--- a/ethereal/ui/ui_lib.go
+++ b/ethereal/ui/ui_lib.go
@@ -138,7 +138,7 @@ func (ui *UiLib) DebugTx(recipient, valueStr, gasStr, gasPriceStr, data string)
 	callerTx := ethchain.NewContractCreationTx(ethutil.Big(valueStr), ethutil.Big(gasStr), ethutil.Big(gasPriceStr), callerScript, nil)
 
 	// Contract addr as test address
-	keyPair := ethutil.Config.Db.GetKeys()[0]
+	keyPair := ethutil.GetKeyRing().Get(0)
 	account := ui.eth.StateManager().TransState().GetStateObject(keyPair.Address())
 	c := ethchain.MakeContract(callerTx, state)
 	callerClosure := ethchain.NewClosure(account, c, c.Script(), state, ethutil.Big(gasStr), ethutil.Big(gasPriceStr))
diff --git a/ethereum/dev_console.go b/ethereum/dev_console.go
index 9bdd58942..5941c03ab 100644
--- a/ethereum/dev_console.go
+++ b/ethereum/dev_console.go
@@ -173,8 +173,8 @@ func (i *Console) ParseInput(input string) bool {
 			} else {
 				tx := ethchain.NewTransactionMessage(recipient, ethutil.Big(tokens[2]), ethutil.Big(tokens[3]), ethutil.Big(tokens[4]), nil)
 
-				key := ethutil.Config.Db.GetKeys()[0]
-				tx.Sign(key.PrivateKey)
+				keyPair := ethutil.GetKeyRing().Get(0)
+				tx.Sign(keyPair.PrivateKey)
 				i.ethereum.TxPool().QueueTransaction(tx)
 
 				fmt.Printf("%x\n", tx.Hash())
@@ -207,8 +207,8 @@ func (i *Console) ParseInput(input string) bool {
 
 			contract := ethchain.NewContractCreationTx(ethutil.Big(tokens[0]), ethutil.Big(tokens[1]), ethutil.Big(tokens[1]), mainScript, initScript)
 
-			key := ethutil.Config.Db.GetKeys()[0]
-			contract.Sign(key.PrivateKey)
+			keyPair := ethutil.GetKeyRing().Get(0)
+			contract.Sign(keyPair.PrivateKey)
 
 			i.ethereum.TxPool().QueueTransaction(contract)
 
diff --git a/ethereum/ethereum.go b/ethereum/ethereum.go
index babebbb48..2abf6da42 100644
--- a/ethereum/ethereum.go
+++ b/ethereum/ethereum.go
@@ -1,13 +1,9 @@
 package main
 
 import (
-	"encoding/hex"
 	"fmt"
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
-	"github.com/ethereum/eth-go/ethminer"
-	"github.com/ethereum/eth-go/ethpub"
-	"github.com/ethereum/eth-go/ethrpc"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/utils"
 	"log"
@@ -68,10 +64,9 @@ func main() {
 		log.SetOutput(logfile)
 		logSys = log.New(logfile, "", flags)
 		logger.AddLogSystem(logSys)
-	}
-	/*else {
+	} else {
 		logSys = log.New(os.Stdout, "", flags)
-	}*/
+	}
 
 	ethchain.InitFees()
 
@@ -106,8 +101,19 @@ func main() {
 		}
 		os.Exit(0)
 	case ExportKey:
-		key := ethutil.Config.Db.GetKeys()[0]
-		logSys.Println(fmt.Sprintf("prvk: %x\n", key.PrivateKey))
+		keyPair := ethutil.GetKeyRing().Get(0)
+		fmt.Printf(`
+Generating new address and keypair.
+Please keep your keys somewhere save.
+
+++++++++++++++++ KeyRing +++++++++++++++++++
+addr: %x
+prvk: %x
+pubk: %x
+++++++++++++++++++++++++++++++++++++++++++++
+save these words so you can restore your account later: %s
+`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
+
 		os.Exit(0)
 	case ShowGenesis:
 		logSys.Println(ethereum.BlockChain().Genesis())
@@ -127,28 +133,7 @@ func main() {
 	ethereum.Mining = StartMining
 
 	if StartMining {
-		logger.Infoln("Miner started")
-
-		// Fake block mining. It broadcasts a new block every 5 seconds
-		go func() {
-
-			if StartMining {
-				logger.Infoln("Miner started")
-
-				go func() {
-					data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
-					keyRing := ethutil.NewValueFromBytes(data)
-					addr := keyRing.Get(1).Bytes()
-
-					pair, _ := ethchain.NewKeyPairFromSec(ethutil.FromHex(hex.EncodeToString(addr)))
-
-					miner := ethminer.NewDefaultMiner(pair.Address(), ethereum)
-					miner.Start()
-
-				}()
-			}
-		}()
-
+		utils.DoMining(ethereum)
 	}
 
 	if StartConsole {
@@ -162,12 +147,7 @@ func main() {
 		go console.Start()
 	}
 	if StartRpc {
-		ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
-		if err != nil {
-			logger.Infoln("Could not start RPC interface:", err)
-		} else {
-			go ethereum.RpcServer.Start()
-		}
+		utils.DoRpc(ethereum, RpcPort)
 	}
 
 	RegisterInterrupts(ethereum)
diff --git a/utils/cmd.go b/utils/cmd.go
new file mode 100644
index 000000000..8395ac8fc
--- /dev/null
+++ b/utils/cmd.go
@@ -0,0 +1,46 @@
+package utils
+
+import (
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethminer"
+	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethrpc"
+	"github.com/ethereum/eth-go/ethutil"
+	"log"
+	"time"
+)
+
+func DoRpc(ethereum *eth.Ethereum, RpcPort int) {
+	var err error
+	ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
+	if err != nil {
+		log.Println("Could not start RPC interface:", err)
+	} else {
+		go ethereum.RpcServer.Start()
+	}
+}
+
+func DoMining(ethereum *eth.Ethereum) {
+	// Set Mining status
+	ethereum.Mining = true
+
+	if ethutil.GetKeyRing().Len() == 0 {
+		log.Println("No address found, can't start mining")
+		return
+	}
+	keyPair := ethutil.GetKeyRing().Get(0)
+	addr := keyPair.Address()
+
+	go func() {
+		// Give it some time to connect with peers
+		time.Sleep(3 * time.Second)
+
+		for ethereum.IsUpToDate() == false {
+			time.Sleep(5 * time.Second)
+		}
+		log.Println("Miner started")
+
+		miner := ethminer.NewDefaultMiner(addr, ethereum)
+		miner.Start()
+	}()
+}
diff --git a/utils/keys.go b/utils/keys.go
index 2f39c10b2..1c0f6a9d6 100644
--- a/utils/keys.go
+++ b/utils/keys.go
@@ -6,6 +6,60 @@ import (
 	"github.com/obscuren/secp256k1-go"
 )
 
+func CreateKeyPair(force bool) {
+	if force {
+		ethutil.GetKeyRing().Reset()
+		fmt.Println("resetting")
+	}
+
+	if ethutil.GetKeyRing().Get(0) == nil {
+		_, prv := secp256k1.GenerateKeyPair()
+
+		keyPair, err := ethutil.GetKeyRing().NewKeyPair(prv)
+		if err != nil {
+			panic(err)
+		}
+
+		mne := ethutil.MnemonicEncode(ethutil.Hex(keyPair.PrivateKey))
+
+		fmt.Printf(`
+Generating new address and keypair.
+Please keep your keys somewhere save.
+
+++++++++++++++++ KeyRing +++++++++++++++++++
+addr: %x
+prvk: %x
+pubk: %x
+++++++++++++++++++++++++++++++++++++++++++++
+save these words so you can restore your account later: %s
+`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey, mne)
+	}
+}
+
+func ImportPrivateKey(sec string) {
+	ethutil.GetKeyRing().Reset()
+
+	keyPair, err := ethutil.GetKeyRing().NewKeyPair(ethutil.FromHex(sec))
+	if err != nil {
+		panic(err)
+	}
+
+	mne := ethutil.MnemonicEncode(ethutil.Hex(keyPair.PrivateKey))
+
+	fmt.Printf(`
+Generating new address and keypair.
+Please keep your keys somewhere save.
+
+++++++++++++++++ KeyRing +++++++++++++++++++
+addr: %x
+prvk: %x
+pubk: %x
+++++++++++++++++++++++++++++++++++++++++++++
+save these words so you can restore your account later: %s
+`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey, mne)
+}
+
+/*
 func CreateKeyPair(force bool) {
 	data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
 	if len(data) == 0 || force {
@@ -28,7 +82,9 @@ save these words so you can restore your account later: %s
 
 	}
 }
+*/
 
+/*
 func ImportPrivateKey(prvKey string) {
 	key := ethutil.FromHex(prvKey)
 	msg := []byte("tmp")
@@ -49,3 +105,4 @@ pubk: %x
 
 `, pair.Address(), key, pub)
 }
+*/