Hello, Current regression tests for the trunk version of Boost.MultiIndex show hash-related problems for the test_modifiers test case in MSVC 7.1 and 8.0: http://tinyurl.com/yvgg9l http://tinyurl.com/29wqoy but I've got the hunch that the error is really an artifact in the particular regression test runner showing the results. Would someone with access to MSVC 7.1 and/or 8.0 be so kind as to try to compile and run the *trunk* version of test_modifiers test case at libs/multi_index/test and report the results? Thank you, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo