They switched to border-box in 3.0. Note in 3.0 release notes: http://blog.getbootstrap.com/2013/08/19/bootstrap-3-released/ http://blog.getbootstrap.com/2013

They switched to border-box in 3.0. Note in 3.0 release notes: http://blog.getbootstrap.com/2013/08/19/bootstrap-3-released/ http://blog.getbootstrap.com/2013/08/19/bootstrap-3-released... Code at top of scaffolding.less: https://github.com/twbs/bootstrap/blob/master/less/scaffolding.less https://github.com/twbs/bootstrap/blob/master/less/scaffoldi...