diff --git a/bindings/python/mapnik_text_placement.cpp b/bindings/python/mapnik_text_placement.cpp
index 13de8478b..e22eb26b8 100644
--- a/bindings/python/mapnik_text_placement.cpp
+++ b/bindings/python/mapnik_text_placement.cpp
@@ -193,7 +193,8 @@ struct ListNodeWrap: formatting::list_node, wrapper<formatting::list_node>
     ListNodeWrap(object l) : formatting::list_node(), wrapper<formatting::list_node>()
     {
         stl_input_iterator<formatting::node_ptr> begin(l), end;
-        children_.insert(children_.end(), begin, end);
+        // FIXME c++11 :  error: call to 'make_move_iterator' is ambiguous 
+        // children_.insert(children_.end(), begin, end);
     }
 
     /* TODO: Add constructor taking variable number of arguments.
diff --git a/demo/viewer/viewer.pro b/demo/viewer/viewer.pro
index 538419e49..6d112c1bb 100644
--- a/demo/viewer/viewer.pro
+++ b/demo/viewer/viewer.pro
@@ -1,18 +1,29 @@
 ######################################################################
 # Mapnik viewer - Copyright (C) 2007 Artem Pavlenko
 ######################################################################
-CC = g++
+QMAKE_CXX = /opt/llvm/bin/clang++
 TEMPLATE = app
 
-INCLUDEPATH += /usr/local/include/
-INCLUDEPATH += /usr/boost/include/
-INCLUDEPATH += /usr/X11/include/
-INCLUDEPATH += /usr/X11/include/freetype2
+INCLUDEPATH += /opt/mapnik/include/
+INCLUDEPATH += /opt/boost_1_49_0/include/
+INCLUDEPATH += /opt/mapnik_deps/include/
+INCLUDEPATH += /opt/mapnik_deps/include/freetype2
+
+### Cairo backend
+INCLUDEPATH += /opt/mapnik_deps/include/cairo
+INCLUDEPATH += /opt/mapnik_deps/include/cairomm-1.0
+INCLUDEPATH += /opt/mapnik_deps/include/sigc++-2.0
+INCLUDEPATH += /opt/mapnik_deps/lib/sigc++-2.0/include
+###
+
+INCLUDEPATH += /Users/artem/Projects/mapnik/deps/agg/include
 INCLUDEPATH += .
 
-QMAKE_CXXFLAGS +=' -DDARWIN -Wno-missing-field-initializers -ansi'
-unix:LIBS =  -L/usr/local/lib -L/usr/X11/lib -lmapnik -lfreetype
-unix:LIBS += -lboost_system -licuuc -lboost_filesystem -lboost_regex
+QMAKE_CXXFLAGS +='-DDARWIN -Wno-missing-field-initializers -fno-inline -ansi'
+QMAKE_CXXFLAGS +=' -DHAVE_CAIRO'
+unix:LIBS =  -L/opt/mapnik/lib -L/opt/mapnik_deps/lib -lmapnik -lfreetype -L/opt/mapnik/lib 
+unix:LIBS += -lboost_system -licuuc -lboost_filesystem -lboost_regex -L/opt/boost_1_49_0/lib
+unix:LIBS += -lcairo -lcairomm-1.0
 
 # Input
 
diff --git a/include/mapnik/image_filter_types.hpp b/include/mapnik/image_filter_types.hpp
index 5502f66c1..d4e073263 100644
--- a/include/mapnik/image_filter_types.hpp
+++ b/include/mapnik/image_filter_types.hpp
@@ -43,7 +43,8 @@ struct agg_stack_blur
         : rx(rx_),ry(ry_) {}
     // an attempt to support older boost spirit (< 1.46)
     agg_stack_blur()
-        : rx(0),ry(0) {}
+        : rx(1),ry(1) {}
+    
     unsigned rx;
     unsigned ry;
 };