diff --git a/core/blockchain.go b/core/blockchain.go
index 8eb7de9824..6462c17fa5 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -29,6 +29,7 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/mclock"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
@@ -799,7 +800,7 @@ func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain
 	if stats.ignored > 0 {
 		ignored = fmt.Sprintf(" (%d ignored)", stats.ignored)
 	}
-	glog.V(logger.Info).Infof("imported %d receipts in %9v. #%d [%x… / %x…]%s", stats.processed, common.PrettyDuration(time.Since(start)), last.Number(), first.Hash().Bytes()[:4], last.Hash().Bytes()[:4], ignored)
+	glog.V(logger.Info).Infof("imported %4d receipts in %9v. #%d [%x… / %x…]%s", stats.processed, common.PrettyDuration(time.Since(start)), last.Number(), first.Hash().Bytes()[:4], last.Hash().Bytes()[:4], ignored)
 
 	return 0, nil
 }
@@ -875,7 +876,7 @@ func (self *BlockChain) InsertChain(chain types.Blocks) (int, error) {
 	// faster than direct delivery and requires much less mutex
 	// acquiring.
 	var (
-		stats         = insertStats{startTime: time.Now()}
+		stats         = insertStats{startTime: mclock.Now()}
 		events        = make([]interface{}, 0, len(chain))
 		coalescedLogs []*types.Log
 		nonceChecked  = make([]bool, len(chain))
@@ -1031,7 +1032,7 @@ type insertStats struct {
 	queued, processed, ignored int
 	usedGas                    uint64
 	lastIndex                  int
-	startTime                  time.Time
+	startTime                  mclock.AbsTime
 }
 
 // statsReportLimit is the time limit during import after which we always print
@@ -1043,12 +1044,9 @@ const statsReportLimit = 8 * time.Second
 func (st *insertStats) report(chain []*types.Block, index int) {
 	// Fetch the timings for the batch
 	var (
-		now     = time.Now()
-		elapsed = now.Sub(st.startTime)
+		now     = mclock.Now()
+		elapsed = time.Duration(now) - time.Duration(st.startTime)
 	)
-	if elapsed == 0 { // Yes Windows, I'm looking at you
-		elapsed = 1
-	}
 	// If we're at the last block of the batch or report period reached, log
 	if index == len(chain)-1 || elapsed >= statsReportLimit {
 		start, end := chain[st.lastIndex], chain[index]
@@ -1063,7 +1061,7 @@ func (st *insertStats) report(chain []*types.Block, index int) {
 		} else {
 			hashes = fmt.Sprintf("%x…", end.Hash().Bytes()[:4])
 		}
-		glog.Infof("imported %d blocks, %5d txs (%7.3f Mg) in %9v (%6.3f Mg/s). #%v [%s]%s", st.processed, txcount, float64(st.usedGas)/1000000, common.PrettyDuration(elapsed), float64(st.usedGas)*1000/float64(elapsed), end.Number(), hashes, extra)
+		glog.Infof("imported %4d blocks, %5d txs (%7.3f Mg) in %9v (%6.3f Mg/s). #%v [%s]%s", st.processed, txcount, float64(st.usedGas)/1000000, common.PrettyDuration(elapsed), float64(st.usedGas)*1000/float64(elapsed), end.Number(), hashes, extra)
 
 		*st = insertStats{startTime: now, lastIndex: index}
 	}
diff --git a/core/headerchain.go b/core/headerchain.go
index ca630a4f77..1dc189323d 100644
--- a/core/headerchain.go
+++ b/core/headerchain.go
@@ -339,7 +339,7 @@ func (hc *HeaderChain) InsertHeaderChain(chain []*types.Header, checkFreq int, w
 	if stats.ignored > 0 {
 		ignored = fmt.Sprintf(" (%d ignored)", stats.ignored)
 	}
-	glog.V(logger.Info).Infof("imported %d headers%s in %9v. #%v [%x… / %x…]", stats.processed, ignored, common.PrettyDuration(time.Since(start)), last.Number, first.Hash().Bytes()[:4], last.Hash().Bytes()[:4])
+	glog.V(logger.Info).Infof("imported %4d headers%s in %9v. #%v [%x… / %x…]", stats.processed, ignored, common.PrettyDuration(time.Since(start)), last.Number, first.Hash().Bytes()[:4], last.Hash().Bytes()[:4])
 
 	return 0, nil
 }