Robert, in revision 43697 you have added usage requirements to serialization's Jamfile, as follows: http://tinyurl.com/2hbzyu It appears that this change is not necessary. If any other target depends on serialization, then it will implicitly depend on serialization's dependencies. Adding <dependency> to usage requirements will mean that if I have a library depending on serialization, than that library will also have dependency on ../../config/test//BOOST_NO_STD_LOCALE If my library does not use that, there's no reason why it should have a dependency. Furthermore, due to the way Boost is build, this dependency can be added to basically all libraries, which is hardly needed. Because of that, I have removed usage-requirements setting on trunk. Also, I've noticed that you have about 10 commits, all having the same commit message: Support serialization in DLLS Make thread-safe fix portable binary archives It does not seem a good practice, as it's hard to understand what each given commit was meant to do. Can you try to use descriptive messages for each commit. FWIW, good guidelines on writing commit messages can be found at: http://subversion.tigris.org/hacking.html#log-messages Thanks, Volodya