I used a fresh version of GIL from SVN trunk, and when I say make all from within the boost/libs/gil folder I get a slew of errors including: image.cpp:302: instantiated from here c:\mingw\bin\../lib/gcc/mingw32/4.3.0/include/c++/bits/boost_concept_check.h:223: error: conversion from 'boost::detail::iterator_category_with_traversal<std::input_iterator_tag, boost::random_access_traversal_tag>' to non-scalar type 'std::forward_iterator_tag' requested I have some patches to GIL, but I can not seem to do regression testing since the unmodified version of GIL itself does not seem pass its tests. Am I doing something wrong? I looked at the Jamfile.v2 and it did not seem to add much to what the makefile was doing, but just in case I ran bjam from within the GIL folder and got the same results -- image.cpp filed to compile. I thought the error might involve the iterator library because of the error message I got, but Boost.Iterator seemed to pass all of its tests on my system. Also, the GIL makefile has a line 'CXX=/usr/local/gcc430/bin/g++', so it looks like this version of the compiler has been tested before... --John