Index: qgsmapcanvas.cpp
===================================================================
--- qgsmapcanvas.cpp	(revision 14982)
+++ qgsmapcanvas.cpp	(working copy)
@@ -579,6 +579,8 @@
 
   if ( mLastExtentIndex > 0 )
   {
+    // This code should duplicate QgsMapCanvas::setExtent(), but without
+    // modifying the view history.
     mLastExtentIndex--;
     mMapRenderer->setExtent( mLastExtent[mLastExtentIndex] );
     emit extentsChanged();
@@ -589,6 +591,8 @@
     // update controls' enabled state
     emit zoomLastStatusChanged( mLastExtentIndex > 0 );
     emit zoomNextStatusChanged( mLastExtentIndex < mLastExtent.size() - 1 );
+
+    updateCanvasItemPositions();
   }
 
 } // zoomToPreviousExtent
@@ -601,6 +605,8 @@
   }
   if ( mLastExtentIndex < mLastExtent.size() - 1 )
   {
+    // This code should duplicate QgsMapCanvas::setExtent(), but without
+    // modifying the view history.
     mLastExtentIndex++;
     mMapRenderer->setExtent( mLastExtent[mLastExtentIndex] );
     emit extentsChanged();
@@ -611,6 +617,8 @@
     // update controls' enabled state
     emit zoomLastStatusChanged( mLastExtentIndex > 0 );
     emit zoomNextStatusChanged( mLastExtentIndex < mLastExtent.size() - 1 );
+
+    updateCanvasItemPositions();
   }
 }// zoomToNextExtent