Hi there, first of all thanks for a great beta release. I have tested it with a fairly complex application of mine, making heavy use of serialization (the core dumps reported in a recent thread on the user's list seem to be gone - great, thanks Robert :-), boost.threads, boost.asio, boost.bind, and smart pointers. I have so far run into *no major* difficulties, but will of course report issues as they arise. *** A small, but from my point of view still significant, nuisance is that bug report 2091 doesn't appear to have been fixed, although it is easy to cure with a change of typedef dst_adjustment_offsets<time_duration_type> dst_adjustment_offsets; to typedef boost::date_time::dst_adjustment_offsets<time_duration_type> dst_adjustment_offsets; in line 161 of <BOOSTROOT>/boost/date_time/tz_db_base.hpp . Alternatively it is possible to rename the typedef in line 161 and in the 2 or so subsequent occurances. *** In the absence of this fix, I need to patch Boost on many recent Linux patforms (at least a current Debian Lenny and OpenSUSE 11, but likely others as well, if they have a g++ 4.3.x Compiler). Best Regards, Ruediger