I don't know if that's the same as in boost.python but the serialization library now shows up white cells, too: http://tinyurl.com/3pvzv It's remarkable that all these are results of compile or compile-fail tests and the tests would succeed if they are reported correctly. I attach an excerpt of my bjam.log: please have a look at it, it seems to me that everything is correct except the interpretation of the results. Stefan ***************************************************************************** ** ** ** WARNING: This email contains an attachment of a very suspicious type. ** ** You are urged NOT to open this attachment unless you are absolutely ** ** sure it is legitmate. Opening this attachment may cause irreparable ** ** damage to your computer and your files. If you have any questions ** ** about the validity of this message, PLEASE SEEK HELP BEFORE OPENING IT. ** ** ** ** This warning was added by the IU Computer Science Dept. mail scanner. ** *****************************************************************************