diff -Naur k3d-source-0.8.0.2.orig/k3dsdk/gil/boost/gil/extension/dynamic_image/apply_operation_base.hpp k3d-source-0.8.0.2/k3dsdk/gil/boost/gil/extension/dynamic_image/apply_operation_base.hpp

--- k3d-source-0.8.0.2.orig/k3dsdk/gil/boost/gil/extension/dynamic_image/apply_operation_base.hpp	2010-07-03 04:27:47.000000000 +0200

+++ k3d-source-0.8.0.2/k3dsdk/gil/boost/gil/extension/dynamic_image/apply_operation_base.hpp	2011-02-10 07:42:05.369909078 +0100

@@ -114,7 +114,7 @@

     template <typename T2, typename Op>

     struct reduce_bind1 {

         const T2& _t2;

-        mutable Op&  _op;

+        Op&  _op;

         typedef typename Op::result_type result_type;

@@ -127,7 +127,7 @@

     struct reduce_bind2 {

         const Bits1& _bits1;

         std::size_t _index1;

-        mutable Op&  _op;

+        Op&  _op;

         typedef typename Op::result_type result_type;