visionmedia/nib — Issue #68: Use filter fallback for rgba values in =<IE8
Author: jokull
Created: 2012-02-06 12:49:14+00:00
State: open

progid:DXImageTransform.Microsoft.gradient with the same #RRGGBBAA value can act as a fallback for browser that do not support rgba values.

Is this a good idea?

See this article http://css-tricks.com/rgba-browser-support/