twitter/bootstrap — pull request #2867 by mfo (2012-03-29 13:53:16+00:00)
Title: Inputs are screws when contained in an html block with z-index > 2.

Hi guys,

i think their is a tricky part in the tw-bootstrap...
Consider that your inputs are contained in a box which is layered with a z-index 1000;
What happen on focus? Your input goes behind it's container, then you see nothing :-(

So, i pushed a naive fix, hope it helps.