Compiling the following code on MSVC80, sp1 has different behaviour in the latest CVS head compared to 1_33_1? double dbl(88.8); std::cout << boost::lexical_caststd::string(dbl) << std::endl; boost1.33.1 = 88.8 boost::CVS = 88.799999999999997 Any ideas as I prefer the old behaviour? Thanks.