I don't think the Storm was ever able to do that (at least not after .75). Let's just hope RIM fixes it in the future because all other Blackberries have the feature.
Well I'm glad I'm not the only one irritated this was removed. I thot for a min my mute button didn't work anymore until I tested it with the music. I want this feature back as I used it on a daily basis. C'mon now...........