twbs/bootstrap — pull request #13759 by tamarazuk (2014-06-09 06:06:04+00:00)
Title: input-group-btn: Fix IE8 crash with `font-size: 0;`

To recreate the crash visit http://getbootstrap.com/components/ in Internet Explorer 8 with Windows XP. This particle page in Windows 7 starts to crash but recovers eventually.