Newly merged MPL seems to be having problems in Intel 7.x/8.0 under Linux with BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN, as shown in http://tinyurl.com/5rj4d Appart from this, the merge is mostly working fine, as far as multi_index is concerned. There's another MPL-related problem, but it's due to a previously masked bug of mine. Congrats and thanks for the staggering effort. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo