filter:progid causes error. Is this valid CSS?

Jun 25, 2012 at 9:34 PM

Hello people.

I'm using AD Gallery and try to deploy my app on However I get this error on this line:

filter:progid:DXImageTransform.Microsoft.AlphaImageLoader (enabled=true, sizingMethod=scale, src='opa75.png')

The error:

Invalid CSS after "...phaImageLoader ": expected "{", was "(enabled=true, ..."2012-06-25T21:27:13+00:00 app[web.1]:   (in /app/app/assets/stylesheets/

What is this CSS line exactly doing? Is it needed? If I remove it the gallery seems fine (on chrome,firefox,safari).