Boost release 1.66.0 beta 1 is now available at:

<https://dl.bintray.com/boostorg/beta/1.66.0.beta.1/source/>

The SHA256 checksums are as follows:

e7b23e638e8c3a9da1512439385b04850829cea7bd56d8398677c096857d830b
boost_1_66_0_b1.7z
5d0405eb73bd609ebcd54bbc96d4f1e2d97c51b96c4703706695ddd94f942d6b
boost_1_66_0_b1.tar.bz2
f0f455e39bc47b2b670a17cb221687506e9a22dc478956d3d8aabb9cb835a7dc
boost_1_66_0_b1.tar.gz
694c8b9e902b7981670bce166f675f3875c19326936db51aabd98d2ddfea9b45
boost_1_66_0_b1.zip

For details of what's in the release, see
<http://www.boost.org/users/history/version_1_66_0.html>.

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

Thanks,

-- The Boost Release Team