See http://jsfiddle.net/aJ333/1/ in Chrome and then in either Firefox or Internet Explorer. The image is originally 120px, and I\'m scaling down to 28px, but it looks bad pr
I've seen the same thing in firefox, css transform scaled transparent png's looking very rough.
I noticed that when they previously had a background color set the quality was much better, so I tried setting an RGBA background with as low an opacity value as possible.
background:rgba(255,255,255,0.001);
This worked for me, give it a try.