I don't know if the following are fixable or not, but there are a few regex lib tests failing on gcc-2.95 with: In file included from /boost/head-regression/boost/boost/test/included/test_exec_monitor.hpp:27, from ../libs/regex/test/object_cache/object_cache_test.cpp:19: /boost/head-regression/boost/boost/test/impl/unit_test_log.ipp: At top level: /boost/head-regression/boost/boost/test/impl/unit_test_log.ipp:37: redefinition of `struct io_saver_type' /boost/head-regression/boost/boost/test/impl/results_reporter.ipp:35: previous definition here /boost/head-regression/boost/boost/test/impl/unit_test_log.ipp:40: confused by earlier errors, bailing out Given that this is an old compiler can these be fixed without undue heroics? Thanks, John.