diff --git a/libretroshare/src/gxs/rsgxsnetservice.cc b/libretroshare/src/gxs/rsgxsnetservice.cc
index c56247d20..cfc03f187 100644
--- a/libretroshare/src/gxs/rsgxsnetservice.cc
+++ b/libretroshare/src/gxs/rsgxsnetservice.cc
@@ -320,6 +320,18 @@ int RsGxsNetService::tick()
     if(receivedItems())
         recvNxsItemQueue();
 
+    bool should_notify = false;
+    
+    {
+	    RS_STACK_MUTEX(mNxsMutex) ;
+
+	    should_notify = should_notify || !mNewGroupsToNotify.empty() ;
+	    should_notify = should_notify || !mNewMessagesToNotify.empty() ;
+    }
+    
+    if(should_notify)
+        processObserverNotifications() ;
+    
     time_t now = time(NULL);
     time_t elapsed = mSYNC_PERIOD + mSyncTs;
 
@@ -346,6 +358,29 @@ int RsGxsNetService::tick()
     return 1;
 }
 
+void RsGxsNetService::processObserverNotifications()
+{
+#ifdef NXS_NET_DEBUG_0
+    GXSNETDEBUG___ << "Processing observer notification." << std::endl;
+#endif
+    
+    std::vector<RsNxsGrp*> grps_copy ;
+    std::vector<RsNxsMsg*> msgs_copy ;
+
+    {
+	    RS_STACK_MUTEX(mNxsMutex) ;
+
+	    grps_copy = mNewGroupsToNotify ;
+	    msgs_copy = mNewMessagesToNotify ;
+
+	    mNewGroupsToNotify.clear() ;
+	    mNewMessagesToNotify.clear() ;
+    }
+
+    mObserver->notifyNewGroups(grps_copy);
+    mObserver->notifyNewMessages(msgs_copy);
+}
+            
 void RsGxsNetService::rejectMessage(const RsGxsMessageId& msg_id)
 {
     RS_STACK_MUTEX(mNxsMutex) ;
@@ -2170,7 +2205,8 @@ void RsGxsNetService::locked_processCompletedIncomingTrans(NxsTransaction* tr)
                 GXSNETDEBUG_PG(tr->mTransaction->PeerId(),grps[i]->grpId) ;
 #endif
             // notify listener of grps
-            mObserver->notifyNewGroups(grps);
+            for(uint32_t i=0;i<grps.size();++i)
+                mNewGroupsToNotify.push_back(grps[i]) ;
 
             // now note this as the latest you've received from this peer
             RsPeerId peerFrom = tr->mTransaction->PeerId();
@@ -2250,7 +2286,8 @@ void RsGxsNetService::locked_processCompletedIncomingTrans(NxsTransaction* tr)
                 GXSNETDEBUG_PG(tr->mTransaction->PeerId(),grpId) << "   " << msgs[i]->msgId << std::endl ;
 #endif
             // notify listener of msgs
-            mObserver->notifyNewMessages(msgs);
+            for(uint32_t i=0;i<msgs.size();++i)
+                mNewMessagesToNotify.push_back(msgs[i]) ;
 
             // now note that this is the latest you've received from this peer
             // for the grp id
diff --git a/libretroshare/src/gxs/rsgxsnetservice.h b/libretroshare/src/gxs/rsgxsnetservice.h
index 5ab2ef0b4..351ffca7f 100644
--- a/libretroshare/src/gxs/rsgxsnetservice.h
+++ b/libretroshare/src/gxs/rsgxsnetservice.h
@@ -449,6 +449,7 @@ private:
     void locked_stampPeerGroupUpdateTime(const RsPeerId& pid,const RsGxsGroupId& grpId,time_t tm,uint32_t n_messages) ;
 
     void cleanRejectedMessages();
+    void processObserverNotifications();
 private:
 
 
@@ -526,6 +527,8 @@ private:
     RsServiceInfo mServiceInfo;
     
     std::map<RsGxsMessageId,time_t> mRejectedMessages;
+    std::vector<RsNxsGrp*> mNewGroupsToNotify ;
+    std::vector<RsNxsMsg*> mNewMessagesToNotify ;
     
     void debugDump();
 };