diff --git a/src/cpp/ripple/LedgerConsensus.cpp b/src/cpp/ripple/LedgerConsensus.cpp
index 15b03e8784..d4fc7d97fa 100644
--- a/src/cpp/ripple/LedgerConsensus.cpp
+++ b/src/cpp/ripple/LedgerConsensus.cpp
@@ -373,9 +373,12 @@ void LedgerConsensus::checkLCL()
 	uint256 netLgr = mPrevLedgerHash;
 	int netLgrCount = 0;
 
-	uint256 favoredLedger = mPrevLedgerHash; // Don't get stuck one ledger back or jump one forward
+	uint256 favoredLedger = mPrevLedgerHash;			// Don't jump forward
+	uint256 priorLedger;
+	if (mHaveCorrectLCL)
+		priorLedger = mPreviousLedger->getParentHash();	// don't jump back
 	boost::unordered_map<uint256, currentValidationCount> vals =
-		theApp->getValidations().getCurrentValidations(favoredLedger);
+		theApp->getValidations().getCurrentValidations(favoredLedger, priorLedger);
 
 	typedef std::map<uint256, currentValidationCount>::value_type u256_cvc_pair;
 	BOOST_FOREACH(u256_cvc_pair& it, vals)
@@ -900,7 +903,7 @@ SHAMap::pointer LedgerConsensus::getTransactionTree(const uint256& hash, bool do
 	return SHAMap::pointer();
 }
 
-void LedgerConsensus::startAcquiring(const TransactionAcquire::pointer& acquire)
+void LedgerConsensus::startAcquiring(TransactionAcquire::pointer acquire)
 {
 	boost::unordered_map< uint256, std::vector< boost::weak_ptr<Peer> > >::iterator it =
 		mPeerData.find(acquire->getHash());
diff --git a/src/cpp/ripple/LedgerConsensus.h b/src/cpp/ripple/LedgerConsensus.h
index 1e6ef47941..e511ad4a01 100644
--- a/src/cpp/ripple/LedgerConsensus.h
+++ b/src/cpp/ripple/LedgerConsensus.h
@@ -128,7 +128,7 @@ protected:
 	void accept(SHAMap::ref txSet, LoadEvent::pointer);
 
 	void weHave(const uint256& id, Peer::ref avoidPeer);
-	void startAcquiring(const TransactionAcquire::pointer&);
+	void startAcquiring(TransactionAcquire::pointer);
 	SHAMap::pointer find(const uint256& hash);
 
 	void createDisputes(SHAMap::ref, SHAMap::ref);
diff --git a/src/cpp/ripple/LedgerTiming.h b/src/cpp/ripple/LedgerTiming.h
index c7539c081a..246db51cfb 100644
--- a/src/cpp/ripple/LedgerTiming.h
+++ b/src/cpp/ripple/LedgerTiming.h
@@ -7,11 +7,11 @@
 // The number of seconds a validation remains current after its ledger's close time
 // This is a safety to protect against very old validations and the time it takes to adjust
 // the close time accuracy window
-#	define LEDGER_VAL_INTERVAL		600
+#	define LEDGER_VAL_INTERVAL		300
 
 // The number of seconds before a close time that we consider a validation acceptable
 // This protects against extreme clock errors
-#	define LEDGER_EARLY_INTERVAL	240
+#	define LEDGER_EARLY_INTERVAL	180
 
 // The number of milliseconds we wait minimum to ensure participation
 #	define LEDGER_MIN_CONSENSUS		2000
diff --git a/src/cpp/ripple/NetworkOPs.cpp b/src/cpp/ripple/NetworkOPs.cpp
index 742e630f13..9bc3745b6f 100644
--- a/src/cpp/ripple/NetworkOPs.cpp
+++ b/src/cpp/ripple/NetworkOPs.cpp
@@ -685,7 +685,7 @@ bool NetworkOPs::checkLastClosedLedger(const std::vector<Peer::pointer>& peerLis
 	boost::unordered_map<uint256, ValidationCount> ledgers;
 	{
 		boost::unordered_map<uint256, currentValidationCount> current =
-			theApp->getValidations().getCurrentValidations(closedLedger);
+			theApp->getValidations().getCurrentValidations(closedLedger, prevClosedLedger);
 		typedef std::map<uint256, currentValidationCount>::value_type u256_cvc_pair;
 		BOOST_FOREACH(const u256_cvc_pair& it, current)
 		{
diff --git a/src/cpp/ripple/ValidationCollection.cpp b/src/cpp/ripple/ValidationCollection.cpp
index 032ff4066c..cdbb2818e1 100644
--- a/src/cpp/ripple/ValidationCollection.cpp
+++ b/src/cpp/ripple/ValidationCollection.cpp
@@ -228,10 +228,11 @@ std::list<SerializedValidation::pointer> ValidationCollection::getCurrentTrusted
 }
 
 boost::unordered_map<uint256, currentValidationCount>
-ValidationCollection::getCurrentValidations(uint256 currentLedger)
+ValidationCollection::getCurrentValidations(uint256 currentLedger, uint256 priorLedger)
 {
     uint32 cutoff = theApp->getOPs().getNetworkTimeNC() - LEDGER_VAL_INTERVAL;
     bool valCurrentLedger = currentLedger.isNonZero();
+    bool valPriorLedger = priorLedger.isNonZero();
 
 	boost::unordered_map<uint256, currentValidationCount> ret;
 
@@ -250,7 +251,8 @@ ValidationCollection::getCurrentValidations(uint256 currentLedger)
 		}
 		else
 		{ // contains a live record
-			bool countPreferred = valCurrentLedger && it->second->isPreviousHash(currentLedger);
+			bool countPreferred = (valCurrentLedger && it->second->isPreviousHash(currentLedger)) ||
+				(valPriorLedger && (it->second->getLedgerHash() == priorLedger));
 			tLog(countPreferred, lsDEBUG) << "Counting for " << currentLedger << " not " << it->second->getLedgerHash();
 			currentValidationCount& p = countPreferred ? ret[currentLedger] : ret[it->second->getLedgerHash()];
 
@@ -309,6 +311,7 @@ void ValidationCollection::doWrite(Job&)
 	while (!mStaleValidations.empty())
 	{
 		std::vector<SerializedValidation::pointer> vector;
+		vector.reserve(512);
 		mStaleValidations.swap(vector);
 		sl.unlock();
 		{
diff --git a/src/cpp/ripple/ValidationCollection.h b/src/cpp/ripple/ValidationCollection.h
index 648ea173cb..112e9c1113 100644
--- a/src/cpp/ripple/ValidationCollection.h
+++ b/src/cpp/ripple/ValidationCollection.h
@@ -20,7 +20,7 @@ class ValidationCollection
 {
 protected:
 
-	boost::mutex mValidationLock;
+	boost::mutex													mValidationLock;
 	TaggedCache<uint256, ValidationSet>								mValidations;
 	boost::unordered_map<uint160, SerializedValidation::pointer> 	mCurrentValidations;
 	std::vector<SerializedValidation::pointer> 						mStaleValidations;
@@ -34,7 +34,8 @@ protected:
 	boost::shared_ptr<ValidationSet> findSet(const uint256& ledgerHash);
 
 public:
-	ValidationCollection() : mValidations("Validations", 128, 600), mWriting(false) { ; }
+	ValidationCollection() : mValidations("Validations", 128, 600), mWriting(false)
+	{ mStaleValidations.reserve(512); }
 
 	bool addValidation(SerializedValidation::ref);
 	ValidationSet getValidations(const uint256& ledger);
@@ -46,7 +47,9 @@ public:
 	int getNodesAfter(const uint256& ledger);
 	int getLoadRatio(bool overLoaded);
 
-	boost::unordered_map<uint256, currentValidationCount> getCurrentValidations(uint256 currentLedger);
+	boost::unordered_map<uint256, currentValidationCount> getCurrentValidations(
+		uint256 currentLedger, uint256 previousLedger);
+
 	std::list<SerializedValidation::pointer> getCurrentTrustedValidations();
 
 	void tune(int size, int age);