Randomly (I assume) while surfing or otherwise using my iPhone 3G the on-screen volume indicator will appear on it's own. I had been noticing this for a while but thought I might have been hitting the vol. switch while holding the phone in landscape mode. The other night though I realized I wasn't anywhere near the switch and it did it on it's own. Secondarily, this isn't the same view as if I had actually pushed the button on the side. When I push that it shows the graphic and says 'ringer' on the top, but when this phatom press happens it just shows the graphic. Any ideas people?