twbs/bootstrap — pull request #14466 by saevarom (2014-08-27 15:18:59+00:00)
Title: Specify a max-width for the medium grid

This prevents conflict when using col-md-* and col-lg-* classes together on the same element.

Example:

...

This causes the `col-md-pull-4` class to pull the element even when the browser window is larger than `@screen-lg-min`. This problem is fixed with this pull request.