This file has not been updated since 08/12/07: http://tinyurl.com/48p38y which suggests it contains the expected results for Boost 1.34.1. So, Boost 1.36 tests are and 1.37 tests will be comparing against an outdated file (each version should compare against the former). There doesn't seem to be any documentation on Boost about how to do the updating, and the file is not even mentioned at the release manager's checklist at http://svn.boost.org/trac/boost/wiki/ReleasePractices/ManagerCheckList Joaquín M López Muñoz Telefónica, Investigación y Desarrollo