diff --git a/src/gui/qgisapp.cpp b/src/gui/qgisapp.cpp
index a3a503516747..3eaade58d771 100644
--- a/src/gui/qgisapp.cpp
+++ b/src/gui/qgisapp.cpp
@@ -3352,10 +3352,6 @@ void QgisApp::pan()
   QgsMapTool* tool = new QgsMapToolPan(mMapCanvas);
   tool->setAction(mActionPan);
   mMapCanvas->setMapTool(tool);
-
-  // notify the project we've made a change
-  QgsProject::instance()->dirty(true);
-  
 }
 
 void QgisApp::zoomFull()
diff --git a/src/gui/qgsmaprender.cpp b/src/gui/qgsmaprender.cpp
index 0675436af30d..30f7099a6956 100644
--- a/src/gui/qgsmaprender.cpp
+++ b/src/gui/qgsmaprender.cpp
@@ -41,6 +41,7 @@ QgsMapRender::QgsMapRender()
   mMapUnits = QGis::METERS;
   mScaleCalculator->setMapUnits(mMapUnits);
 
+  mSize = QSize(0,0);
 }
 
 QgsMapRender::~QgsMapRender()