What's the state of support for VC6/7 in Boost.Operators? I'm asking because I started investigating the remaining regressions for Boost.Rational and I've come up against a road-block: I can get everything to work (at least I think so), but not the comparison operators, so: my_rational_1 != my_rational_2 doesn't compile with VC6/7, but does with everything else. I'm assuming that's because these compilers don't find the necessary friend-functions in the operators base classes, or is there something else going on here? The error message is: rational_test.cpp(261) : error C2678: binary '!=' : no operator defined which takes a left-hand operand of type 'class boost::rational<short>' (or there is no acceptable conversion) ../../boost/test/test_case_template.hpp(73) : while compiling class-template member function 'void __thiscall basic_rational_suite::rational_comparison_test<short>::test_method(void)' BTW is the use of Boost.Operators by the rational lib new to this version? If so we might just have to mark up VC6/7 as unsupported. Thanks, John.