diff --git a/README.md b/README.md
index 617a1ac8a3..72e187db70 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Ethereum
 Ethereum Go Development package (C) Jeffrey Wilcke
 
 Ethereum is currently in its testing phase. The current state is "Proof
-of Concept 5.0 RC3". For build instructions see the [Wiki](https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum(Go)).
+of Concept 5.0 RC4". For build instructions see the [Wiki](https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum(Go)).
 
 Ethereum Go is split up in several sub packages Please refer to each
 individual package for more information.
diff --git a/ethereum.go b/ethereum.go
index e3140b5ce5..92c4e4ba17 100644
--- a/ethereum.go
+++ b/ethereum.go
@@ -2,6 +2,7 @@ package eth
 
 import (
 	"container/list"
+	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethdb"
 	"github.com/ethereum/eth-go/ethrpc"
@@ -9,9 +10,11 @@ import (
 	"github.com/ethereum/eth-go/ethwire"
 	"io/ioutil"
 	"log"
+	"math/rand"
 	"net"
 	"net/http"
 	"strconv"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -122,12 +125,20 @@ func (s *Ethereum) TxPool() *ethchain.TxPool {
 	return s.txPool
 }
 
+func (s *Ethereum) ServerCaps() Caps {
+	return s.serverCaps
+}
+
 func (s *Ethereum) AddPeer(conn net.Conn) {
 	peer := NewPeer(conn, s, true)
 
-	if peer != nil && s.peers.Len() < s.MaxPeers {
-		s.peers.PushBack(peer)
-		peer.Start()
+	if peer != nil {
+		if s.peers.Len() < s.MaxPeers {
+			s.peers.PushBack(peer)
+			peer.Start()
+		} else {
+			ethutil.Config.Log.Debugf("[SERV] Max connected peers reached. Not adding incoming peer.")
+		}
 	}
 }
 
@@ -142,15 +153,51 @@ func (s *Ethereum) ConnectToPeer(addr string) error {
 	if s.peers.Len() < s.MaxPeers {
 		var alreadyConnected bool
 
+		ahost, _, _ := net.SplitHostPort(addr)
+		var chost string
+
+		ips, err := net.LookupIP(ahost)
+
+		if err != nil {
+			return err
+		} else {
+			// If more then one ip is available try stripping away the ipv6 ones
+			if len(ips) > 1 {
+				var ipsv4 []net.IP
+				// For now remove the ipv6 addresses
+				for _, ip := range ips {
+					if strings.Contains(ip.String(), "::") {
+						continue
+					} else {
+						ipsv4 = append(ipsv4, ip)
+					}
+				}
+				if len(ipsv4) == 0 {
+					return fmt.Errorf("[SERV] No IPV4 addresses available for hostname")
+				}
+
+				// Pick a random ipv4 address, simulating round-robin DNS.
+				rand.Seed(time.Now().UTC().UnixNano())
+				i := rand.Intn(len(ipsv4))
+				chost = ipsv4[i].String()
+			} else {
+				if len(ips) == 0 {
+					return fmt.Errorf("[SERV] No IPs resolved for the given hostname")
+					return nil
+				}
+				chost = ips[0].String()
+			}
+		}
+
 		eachPeer(s.peers, func(p *Peer, v *list.Element) {
 			if p.conn == nil {
 				return
 			}
 			phost, _, _ := net.SplitHostPort(p.conn.RemoteAddr().String())
-			ahost, _, _ := net.SplitHostPort(addr)
 
-			if phost == ahost {
+			if phost == chost {
 				alreadyConnected = true
+				ethutil.Config.Log.Debugf("[SERV] Peer %s already added.\n", chost)
 				return
 			}
 		})
@@ -278,8 +325,21 @@ func (s *Ethereum) Start(seed bool) {
 }
 
 func (s *Ethereum) Seed() {
-	ethutil.Config.Log.Debugln("Seeding")
-	// DNS Bootstrapping
+	ethutil.Config.Log.Debugln("[SERV] Retrieving seed nodes")
+
+	// Eth-Go Bootstrapping
+	ips, er := net.LookupIP("seed.bysh.me")
+	if er == nil {
+		peers := []string{}
+		for _, ip := range ips {
+			node := fmt.Sprintf("%s:%d", ip.String(), 30303)
+			ethutil.Config.Log.Debugln("[SERV] Found DNS Go Peer:", node)
+			peers = append(peers, node)
+		}
+		s.ProcessPeerList(peers)
+	}
+
+	// Official DNS Bootstrapping
 	_, nodes, err := net.LookupSRV("eth", "tcp", "ethereum.org")
 	if err == nil {
 		peers := []string{}
@@ -293,11 +353,11 @@ func (s *Ethereum) Seed() {
 				for _, a := range addr {
 					// Build string out of SRV port and Resolved IP
 					peer := net.JoinHostPort(a, port)
-					log.Println("Found DNS Bootstrap Peer:", peer)
+					ethutil.Config.Log.Debugln("[SERV] Found DNS Bootstrap Peer:", peer)
 					peers = append(peers, peer)
 				}
 			} else {
-				log.Println("Couldn't resolve :", target)
+				ethutil.Config.Log.Debugln("[SERV} Couldn't resolve :", target)
 			}
 		}
 		// Connect to Peer list
diff --git a/ethpub/pub.go b/ethpub/pub.go
index f7e641b359..4ced632f5c 100644
--- a/ethpub/pub.go
+++ b/ethpub/pub.go
@@ -6,16 +6,18 @@ import (
 )
 
 type PEthereum struct {
+	manager      ethchain.EthManager
 	stateManager *ethchain.StateManager
 	blockChain   *ethchain.BlockChain
 	txPool       *ethchain.TxPool
 }
 
-func NewPEthereum(sm *ethchain.StateManager, bc *ethchain.BlockChain, txp *ethchain.TxPool) *PEthereum {
+func NewPEthereum(manager ethchain.EthManager) *PEthereum {
 	return &PEthereum{
-		sm,
-		bc,
-		txp,
+		manager,
+		manager.StateManager(),
+		manager.BlockChain(),
+		manager.TxPool(),
 	}
 }
 
diff --git a/ethrpc/server.go b/ethrpc/server.go
index 40787fadec..3960e641c3 100644
--- a/ethrpc/server.go
+++ b/ethrpc/server.go
@@ -1,6 +1,7 @@
 package ethrpc
 
 import (
+	"fmt"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"net"
@@ -48,15 +49,16 @@ func (s *JsonRpcServer) Start() {
 	}
 }
 
-func NewJsonRpcServer(ethp *ethpub.PEthereum) *JsonRpcServer {
-	l, err := net.Listen("tcp", ":30304")
+func NewJsonRpcServer(ethp *ethpub.PEthereum, port int) (*JsonRpcServer, error) {
+	sport := fmt.Sprintf(":%d", port)
+	l, err := net.Listen("tcp", sport)
 	if err != nil {
-		ethutil.Config.Log.Infoln("Error starting JSON-RPC")
+		return nil, err
 	}
 
 	return &JsonRpcServer{
 		listener: l,
 		quit:     make(chan bool),
 		ethp:     ethp,
-	}
+	}, nil
 }
diff --git a/ethutil/config.go b/ethutil/config.go
index feab23e023..07dc85f086 100644
--- a/ethutil/config.go
+++ b/ethutil/config.go
@@ -50,7 +50,7 @@ func ReadConfig(base string) *config {
 			}
 		}
 
-		Config = &config{ExecPath: path, Debug: true, Ver: "0.5.0 RC3"}
+		Config = &config{ExecPath: path, Debug: true, Ver: "0.5.0 RC4"}
 		Config.Log = NewLogger(LogFile|LogStd, LogLevelDebug)
 		Config.SetClientString("/Ethereum(G)")
 	}
diff --git a/peer.go b/peer.go
index 80ddc5142a..932dbdc18a 100644
--- a/peer.go
+++ b/peer.go
@@ -2,6 +2,7 @@ package eth
 
 import (
 	"bytes"
+	"container/list"
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethutil"
@@ -146,6 +147,7 @@ func NewPeer(conn net.Conn, ethereum *Ethereum, inbound bool) *Peer {
 		port:            30303,
 		pubkey:          pubkey,
 		blocksRequested: 10,
+		caps:            ethereum.ServerCaps(),
 	}
 }
 
@@ -400,22 +402,22 @@ func (p *Peer) HandleInbound() {
 			case ethwire.MsgPeersTy:
 				// Received a list of peers (probably because MsgGetPeersTy was send)
 				// Only act on message if we actually requested for a peers list
-				//if p.requestedPeerList {
-				data := msg.Data
-				// Create new list of possible peers for the ethereum to process
-				peers := make([]string, data.Len())
-				// Parse each possible peer
-				for i := 0; i < data.Len(); i++ {
-					value := data.Get(i)
-					peers[i] = unpackAddr(value.Get(0), value.Get(1).Uint())
-				}
+				if p.requestedPeerList {
+					data := msg.Data
+					// Create new list of possible peers for the ethereum to process
+					peers := make([]string, data.Len())
+					// Parse each possible peer
+					for i := 0; i < data.Len(); i++ {
+						value := data.Get(i)
+						peers[i] = unpackAddr(value.Get(0), value.Get(1).Uint())
+					}
 
-				// Connect to the list of peers
-				p.ethereum.ProcessPeerList(peers)
-				// Mark unrequested again
-				p.requestedPeerList = false
+					// Connect to the list of peers
+					p.ethereum.ProcessPeerList(peers)
+					// Mark unrequested again
+					p.requestedPeerList = false
 
-				//}
+				}
 			case ethwire.MsgGetChainTy:
 				var parent *ethchain.Block
 				// Length minus one since the very last element in the array is a count
@@ -514,6 +516,15 @@ func (p *Peer) Stop() {
 		p.writeMessage(ethwire.NewMessage(ethwire.MsgDiscTy, ""))
 		p.conn.Close()
 	}
+
+	// Pre-emptively remove the peer; don't wait for reaping. We already know it's dead if we are here
+	p.ethereum.peerMut.Lock()
+	defer p.ethereum.peerMut.Unlock()
+	eachPeer(p.ethereum.peers, func(peer *Peer, e *list.Element) {
+		if peer == p {
+			p.ethereum.peers.Remove(e)
+		}
+	})
 }
 
 func (p *Peer) pushHandshake() error {
@@ -533,7 +544,10 @@ func (p *Peer) peersMessage() *ethwire.Msg {
 	outPeers := make([]interface{}, len(p.ethereum.InOutPeers()))
 	// Serialise each peer
 	for i, peer := range p.ethereum.InOutPeers() {
-		outPeers[i] = peer.RlpData()
+		// Don't return localhost as valid peer
+		if !net.ParseIP(peer.conn.RemoteAddr().String()).IsLoopback() {
+			outPeers[i] = peer.RlpData()
+		}
 	}
 
 	// Return the message to the peer with the known list of connected clients
@@ -549,7 +563,7 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 	c := msg.Data
 
 	if c.Get(0).Uint() != ProtocolVersion {
-		ethutil.Config.Log.Debugln("Invalid peer version. Require protocol v5")
+		ethutil.Config.Log.Debugln("Invalid peer version. Require protocol:", ProtocolVersion)
 		p.Stop()
 		return
 	}
@@ -573,7 +587,6 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 	}
 
 	// Catch up with the connected peer
-	// p.CatchupWithPeer(p.ethereum.BlockChain().CurrentBlock.Hash())
 	p.SyncWithBlocks()
 
 	// Set the peer's caps