Currently, on my Macbook Pro (OSX 10.6.5), I will often use the 'mute' button to turn the volume off, for example if I'm working at night. I may then watch a video or something, and decide to have the volume on very quietly. So I press the 'volume up' key—but instead of going to volume level one (the logical 'volume step up' from mute), the volume jumps to whatever mega-decibels I was blasting out before I muted in the first place.
Is there a way to change the behavior of this? Ideally the 'mute' button would be changed to actually turn the volume to zero, rather than just muting. (And re-pressing mute would turn the volume back up to the original).