The second release candidate files for 1.56.0 beta are available at
http://boost.cowic.de/rc/

As always, the release managers would appreciate it if you download
the candidate of your choice and give building it a try. Please report
both success and failure, and anything else that is noteworthy.

Besides bug fixes the TypeIndex library has been included, and I think that the problems that mjklaim@gmail.com was seeing have been fixed.