twitter/bootstrap — pull request #5312 by andriijas (2012-09-27 09:56:10+00:00)
Title: Making modal work with max width 767px - fixes #4860

Issue: #4860 (modals are disappearing on screens with less than 767px of width)
Jsfiddle: This issue is not possible to reproduce in jsfiddle due to the nature of modals and the way jsfiddle handles modals and overlays.

Reproduce:
Go to http://twitter.github.com/bootstrap/javascript.html#modals
Click Launch modal
Resize window
See how modal disapears in when going under 767

Tested browsers:
os x: chrome, firefox, safari
iOS: chrome, safari