diff --git a/indra/newview/llaccountingcostmanager.cpp b/indra/newview/llaccountingcostmanager.cpp
index 0669bdfffa0a01a568ba1993f9d2f891a926d99b..3717344aef3343e1480df158266acdac016f0eae 100644
--- a/indra/newview/llaccountingcostmanager.cpp
+++ b/indra/newview/llaccountingcostmanager.cpp
@@ -41,8 +41,13 @@ class LLAccountingCostResponder : public LLCurl::Responder
 	: mObjectIDs( objectIDs ),
 	  mObserverHandle( observer_handle )
 	{
+		LLAccountingCostObserver* observer = mObserverHandle.get();
+		if (observer)
+		{
+			mTransactionID = observer->getTransactionID();
+		}
 	}
-		
+
 	void clearPendingRequests ( void )
 	{
 		for ( LLSD::array_iterator iter = mObjectIDs.beginArray(); iter != mObjectIDs.endArray(); ++iter )
@@ -57,7 +62,7 @@ class LLAccountingCostResponder : public LLCurl::Responder
 		clearPendingRequests();
 
 		LLAccountingCostObserver* observer = mObserverHandle.get();
-		if (observer)
+		if (observer && observer->getTransactionID() == mTransactionID)
 		{
 			observer->setErrorStatus(statusNum, reason);
 		}
@@ -86,7 +91,7 @@ class LLAccountingCostResponder : public LLCurl::Responder
 			SelectionCost selectionCost( /*transactionID,*/ physicsCost, networkCost, simulationCost );
 
 			LLAccountingCostObserver* observer = mObserverHandle.get();
-			if (observer)
+			if (observer && observer->getTransactionID() == mTransactionID)
 			{
 				observer->onWeightsUpdate(selectionCost);
 			}
@@ -99,6 +104,9 @@ class LLAccountingCostResponder : public LLCurl::Responder
 	//List of posted objects
 	LLSD mObjectIDs;
 
+	// Current request ID
+	LLUUID mTransactionID;
+
 	// Cost update observer handle
 	LLHandle<LLAccountingCostObserver> mObserverHandle;
 };
diff --git a/indra/newview/llaccountingcostmanager.h b/indra/newview/llaccountingcostmanager.h
index cccdc2e2d9324ebb560ccaafc873c00fb6630b18..0bca1f54ef76a7b078c72d63dd5405bdb27c0bba 100644
--- a/indra/newview/llaccountingcostmanager.h
+++ b/indra/newview/llaccountingcostmanager.h
@@ -40,9 +40,13 @@ class LLAccountingCostObserver
 	virtual void onWeightsUpdate(const SelectionCost& selection_cost) = 0;
 	virtual void setErrorStatus(U32 status, const std::string& reason) = 0;
 	const LLHandle<LLAccountingCostObserver>& getObserverHandle() const { return mObserverHandle; }
+	const LLUUID& getTransactionID() { return mTransactionID; }
 
 protected:
+	virtual void generateTransactionID() = 0;
+
 	LLRootHandle<LLAccountingCostObserver> mObserverHandle;
+	LLUUID		mTransactionID;
 };
 //===============================================================================
 class LLAccountingCostManager : public LLSingleton<LLAccountingCostManager>
diff --git a/indra/newview/llfloaterobjectweights.cpp b/indra/newview/llfloaterobjectweights.cpp
index 7bfa8454b665615ed7117db121a569aa0dc49879..0862cd2897e0a7abe4ff1b8232c028b9ad4cacdb 100644
--- a/indra/newview/llfloaterobjectweights.cpp
+++ b/indra/newview/llfloaterobjectweights.cpp
@@ -198,6 +198,9 @@ void LLFloaterObjectWeights::refresh()
 			std::string url = region->getCapability("ResourceCostSelected");
 			if (!url.empty())
 			{
+				// Update the transaction id before the new fetch request
+				generateTransactionID();
+
 				LLAccountingCostManager::getInstance()->fetchCosts(Roots, url, getObserverHandle());
 				toggleWeightsLoadingIndicators(true);
 			}
@@ -209,6 +212,12 @@ void LLFloaterObjectWeights::refresh()
 	}
 }
 
+// virtual
+void LLFloaterObjectWeights::generateTransactionID()
+{
+	mTransactionID.generate();
+}
+
 void LLFloaterObjectWeights::toggleWeightsLoadingIndicators(bool visible)
 {
 	childSetVisible("download_loading_indicator", visible);
diff --git a/indra/newview/llfloaterobjectweights.h b/indra/newview/llfloaterobjectweights.h
index 64aa2f2bbe5e3b45d07bc985ebb7fbc3cc92872d..9a244573bef2ad3fded6d564765020a38a9f3a5e 100644
--- a/indra/newview/llfloaterobjectweights.h
+++ b/indra/newview/llfloaterobjectweights.h
@@ -69,6 +69,8 @@ class LLFloaterObjectWeights : public LLFloater, LLAccountingCostObserver
 	void refresh();
 
 private:
+	/*virtual*/ void generateTransactionID();
+
 	void toggleWeightsLoadingIndicators(bool visible);
 	void toggleLandImpactsLoadingIndicators(bool visible);