Hi all/Jonathan, valgrinding my applications that use zlib reveals that the zlib filter classes leak memory on destruction, as the call to inflateInit2/deflateInit2 is not matched by a corresponding call to inflateEnd/deflateEnd. I notice that boost/iostreams/filter/zlib.hpp has: template<typename Alloc> zlib_compressor_impl<Alloc>::~zlib_compressor_impl() { /*reset(true, false);*/ } and: template<typename Alloc> zlib_decompressor_impl<Alloc>::~zlib_decompressor_impl() { /*reset(false, false);*/ } - which I imagine were added in response George M. Garner's note about what I assume was the same problem (http://lists.boost.org/Archives/boost/2005/03/83379.php). Uncommenting those calls to reset fixes the memory leaks. Are they meant to be commented out in the release? Cheers, Will -- Will Bryant http://carcino.gen.nz/ will@core-dev.co.nz +64 21 655 443