I'm trying to get the GIL examples to compile: using gcc 4.3.0 on a Fedora 9 system with a recent download of boost 1_35 So far I have tried mandelbrot and x_gradient - "as is" in each case. I get compilation errors at lines 46 and 160 of bit_aligned_pixel_reference.hpp: At line 46 bit_aligned_pixel_reference.hpp changes meaning of bit_range from class boost::gil::bit_range<boost::gil::bit_aligned_reference<B,C,L,M>::bit_size, isMutable>" and at line 160 - bit_aligned_pixel_reference.hpp declaration for const boost::gil::bit_aligned_pixel_reference<B,C,L,M>::bit_size,isMutable>&boost::gil::bit_aligned_pixel_refernce<B,C,L,M>::bit_range( ) const Any suggestions as to why things are as expected? I was also getting errors in GIL algorithm.hpp - bad_cast is not a member of std. I "fixed" this by including boost/cast.hpp - this maybe (most likely) is the wrong way to go ? Many thanks Martin