depends on if you were listening to streaming media, or otherwise. Internet players can be controlled over the internet, player turning itself up is not unheard of, yahoo does that all the time.
Player installed in the computer, that is not streaming over the internet should remain steady.
Thanks, Soundguruman. I was listening to steaming music from Napster. The odd thing is, 3 times it turned itself back up to high after I tried lowering it. And I played the same song again without any volume issues. Is the volume control problem with streaming music random and not necessarily tied to a particular song? Thanks again.