twitter/bootstrap — pull request #3648 by superjoe30 (2012-05-30 17:29:20+00:00)
Title: fix gradients with alpha for internet explorer

instead of using, for example, `argb(0, 0, 0, 255)`, this patch uses the format `#ff000000` for colors given to progid:DXImageTransform.Microsoft.gradient, which makes gradients with alpha compatible with internet explorer.