diff -rup /usr/include/boost/gil/bit_aligned_pixel_reference.hpp ./bit_aligned_pixel_reference.hpp
--- /usr/include/boost/gil/bit_aligned_pixel_reference.hpp	2009-10-14 09:39:49.000000000 -0400
+++ ./bit_aligned_pixel_reference.hpp	2009-11-16 19:25:32.000000000 -0500
@@ -169,8 +169,8 @@ private:
 
 private:
     static void check_gray() {  BOOST_STATIC_ASSERT((is_same<typename Layout::color_space_t, gray_t>::value)); }
-    template <typename Channel> void assign(const Channel& chan, mpl::false_) const { check_gray(); at_c<0>(*this)=chan; }
-    template <typename Channel> bool equal (const Channel& chan, mpl::false_) const { check_gray(); return at_c<0>(*this)==chan; }
+    template <typename Channel> void assign(const Channel& chan, mpl::false_) const { check_gray(); gil::at_c<0>(*this)=chan; }
+    template <typename Channel> bool equal (const Channel& chan, mpl::false_) const { check_gray(); return gil::at_c<0>(*this)==chan; }
 };
 
 /////////////////////////////
diff -rup /usr/include/boost/gil/gil_concept.hpp ./gil_concept.hpp
--- /usr/include/boost/gil/gil_concept.hpp	2008-07-08 14:56:09.000000000 -0400
+++ ./gil_concept.hpp	2009-11-16 21:48:11.000000000 -0500
@@ -618,7 +618,7 @@ struct ColorBaseConcept {
         typedef typename kth_element_const_reference_type<ColorBase,num_elements-1>::type CR; 
 
 #if !defined(_MSC_VER) || _MSC_VER > 1310
-        CR cr=at_c<num_elements-1>(cb);  ignore_unused_variable_warning(cr);
+        CR cr=gil::at_c<num_elements-1>(cb);  ignore_unused_variable_warning(cr);
 #endif
 
         // functions that work for every pixel (no need to require them)
Only in .: patch.diff