I don't know where to look for this kind of information -- anybody maintaining Boost.Date_Time now? There are a few patches that have been languishing which might be good to look at and/or apply to trunk: https://svn.boost.org/trac/boost/ticket/1574 https://svn.boost.org/trac/boost/ticket/1674 https://svn.boost.org/trac/boost/ticket/1726 I've verified these locally to not cause any regressions with GCC 4.5 on Ubuntu 10.10 64-bit Linux locally. /me doesn't have commit powers on trunk (yet); maybe someone can apply? TIA, HTH -- Dean Michael Berris about.me/deanberris