diff --git a/core/block_processor.go b/core/block_processor.go
index b3e18a70a..aad40291a 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -257,8 +257,8 @@ func (sm *BlockProcessor) ValidateHeader(block, parent *types.Header) error {
 		return fmt.Errorf("GasLimit check failed for block %v (%v > %v)", block.GasLimit, a, b)
 	}
 
-	// Allow future blocks up to 4 seconds
-	if int64(block.Time)+4 > time.Now().Unix() {
+	// Allow future blocks up to 10 seconds
+	if int64(block.Time)+10 > time.Now().Unix() {
 		return BlockFutureErr
 	}
 
diff --git a/core/state/state_object.go b/core/state/state_object.go
index e44bf2cd6..b8b1972e0 100644
--- a/core/state/state_object.go
+++ b/core/state/state_object.go
@@ -124,7 +124,7 @@ func (self *StateObject) MarkForDeletion() {
 	self.remove = true
 	self.dirty = true
 
-	if glog.V(logger.Debug) {
+	if glog.V(logger.Core) {
 		glog.Infof("%x: #%d %v X\n", self.Address(), self.nonce, self.balance)
 	}
 }
@@ -190,7 +190,7 @@ func (c *StateObject) GetInstr(pc *big.Int) *common.Value {
 func (c *StateObject) AddBalance(amount *big.Int) {
 	c.SetBalance(new(big.Int).Add(c.balance, amount))
 
-	if glog.V(logger.Debug) {
+	if glog.V(logger.Core) {
 		glog.Infof("%x: #%d %v (+ %v)\n", c.Address(), c.nonce, c.balance, amount)
 	}
 }
@@ -198,7 +198,7 @@ func (c *StateObject) AddBalance(amount *big.Int) {
 func (c *StateObject) SubBalance(amount *big.Int) {
 	c.SetBalance(new(big.Int).Sub(c.balance, amount))
 
-	if glog.V(logger.Debug) {
+	if glog.V(logger.Core) {
 		glog.Infof("%x: #%d %v (- %v)\n", c.Address(), c.nonce, c.balance, amount)
 	}
 }
@@ -234,7 +234,7 @@ func (c *StateObject) ConvertGas(gas, price *big.Int) error {
 func (self *StateObject) SetGasPool(gasLimit *big.Int) {
 	self.gasPool = new(big.Int).Set(gasLimit)
 
-	if glog.V(logger.Debug) {
+	if glog.V(logger.Core) {
 		glog.Infof("%x: gas (+ %v)", self.Address(), self.gasPool)
 	}
 }
diff --git a/core/state/statedb.go b/core/state/statedb.go
index e027533aa..065cbd607 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -209,7 +209,7 @@ func (self *StateDB) GetOrNewStateObject(addr common.Address) *StateObject {
 
 // NewStateObject create a state object whether it exist in the trie or not
 func (self *StateDB) newStateObject(addr common.Address) *StateObject {
-	if glog.V(logger.Debug) {
+	if glog.V(logger.Core) {
 		glog.Infof("(+) %x\n", addr)
 	}
 
diff --git a/core/state_transition.go b/core/state_transition.go
index 1994cabf6..e67abb951 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -8,6 +8,8 @@ import (
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/params"
 )
 
@@ -166,9 +168,6 @@ func (self *StateTransition) preCheck() (err error) {
 }
 
 func (self *StateTransition) transitionState() (ret []byte, usedGas *big.Int, err error) {
-	// statelogger.Debugf("(~) %x\n", self.msg.Hash())
-
-	// XXX Transactions after this point are considered valid.
 	if err = self.preCheck(); err != nil {
 		return
 	}
@@ -207,7 +206,7 @@ func (self *StateTransition) transitionState() (ret []byte, usedGas *big.Int, er
 			if err := self.UseGas(dataGas); err == nil {
 				ref.SetCode(ret)
 			} else {
-				statelogger.Infoln("Insufficient gas for creating code. Require", dataGas, "and have", self.gas)
+				glog.V(logger.Core).Infoln("Insufficient gas for creating code. Require", dataGas, "and have", self.gas)
 			}
 		}
 	} else {
diff --git a/logger/verbosity.go b/logger/verbosity.go
index 16f60a100..59caa824e 100644
--- a/logger/verbosity.go
+++ b/logger/verbosity.go
@@ -3,6 +3,7 @@ package logger
 const (
 	Error = iota + 2
 	Info
+	Core
 	Debug
 	Detail
 )
diff --git a/whisper/whisper.go b/whisper/whisper.go
index 1d019aea5..709667729 100644
--- a/whisper/whisper.go
+++ b/whisper/whisper.go
@@ -168,7 +168,7 @@ func (self *Whisper) msgHandler(peer *p2p.Peer, ws p2p.MsgReadWriter) error {
 		for _, envelope := range envelopes {
 			if err := self.add(envelope); err != nil {
 				// TODO Punish peer here. Invalid envelope.
-				peer.Infoln(err)
+				peer.Debugln(err)
 			}
 			wpeer.addKnown(envelope)
 		}