mitchellh/vagrant — pull request #3045 by bmorg (2014-03-02 01:38:40+00:00)
Title: Read box file in binary mode for checksum

On my Windows 7 machine, this fixes the box's MD5 sum not being calculated correctly.

I think this might also fix #2936.

In case you want to test this yourself, I can provide the box file that triggers the error.