twitter/bootstrap — pull request #4378 by demike (2012-08-14 07:38:16+00:00)
Title: Fixing the modal z-index issue + make modal stacking possible

This one line patch fixes the z-index issue mentioned in: Issue #3217
It is also related to Issue #4182.
This pull request should be against 2.1.0-wip branch, hope I got it right this time ;)