Hi there, I'm having an interesting discussion over at the MSDN forums regarding compiler errors with MSVC10 that show up when using standard algorithms and bit_aligned images. Basically the question is why MSVC10 doesn't understand that bit_aligned_pixel_iterator is a random access iterator. For some reasons it thinks it's an input iterator and though std::copy, in this case, cannot find the correct copy implementation. One of the folks over at MSDN thinks that bit_aligned_pixel_iterator isn't implemented correctly with the interator_facade. He/She also thinks that iterator isn't fully standard compliant since it doesn't give a real reference but a proxy object instead when deferencing. I'm not sure if that's correct. Anyone knows if that's true or not. Here is the full text: http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/3c9eac4f-86e4... In any event it seems I need to do some adjustment in the the gil code to have it working with my gil io extension and MSVC10. Right now I have the compiler errors all over my test suite. Regards, Christian