Comment 2 for bug 661072

dragging the volume slider when the sound is muted should not un-mute the sound. if the volume was muted because it was too loud (say, set to 100) and dragging the slider to a lower level un-mutes the sound, the user then has to deal with the too-loud volume until an acceptable level is reached. while I may only have to deal with it for a split second as I move the slider (which is still annoying and possibly annoying for people around me), my great-grandmother may take a little while to get the volume to where she wants it. plus, if the user is using some sort of remote device where holding a button down to continuously decrease the volume is not possible (and individual button presses are needed to decrease the volume a set number each press), then un-muting the volume after the first decrease might leave the user in a situation where they're forced to output a very high volume audio until the desired volume is reached.