Boost release 1.64.0 beta 1 is now available at:

<https://dl.bintray.com/boostorg/beta/1.64.0.beta.1/source/>

The SHA256 checksums are as follows:

8f0ba6b73fad15115049f9b3e7e27eae43be10a94b51a57142f3a27e55ef4beb boost_1_64_0_b1.7z b5c5abf127a3f723dafcc7cf55876c1bda9f014fb1b117f6a7f769e3cc407c4f boost_1_64_0_b1.tar.bz2 a7fe98a9a9f615f6fa68d8ea09ce725d19e3a4fe4719c21c9db29dff88b3b6e3 boost_1_64_0_b1.tar.gz 593005661af8dfe132b2b16bc2cd41339e6acd58456913f353d765090d7868f7 boost_1_64_0_b1.zip

For details of what's in the release, see <http://www.boost.org/users/history/version_1_64_0.html>. Note that the links to files on this web page are for the final release - use the link above to get the beta files.

There are also pre-built libraries provided by Tom Kent here:

<https://dl.bintray.com/boostorg/beta/1.64.0.beta.1/binaries/>

Please download the beta, give it a try, and report any problems you encounter.