I just love the attention to detail Apple surprises us with sometimes. I just noticed the edges of music app title bar and playback button bars reflect light too, not just the volume slider. On the first image, you see the highlights/reflection leaning towards the left and on the second image, towards the right. To avoid confusion and misinderstanding, I will mention I cross posted this on the Verge. http://www.theverge.com/2012/9/24/3381440/wow-music-app-reflection-goes-beyond-volume-knob Also, when you stack the screenshots on top of each other you find that the album art is shifted depending on the device's tilt. You can notice it slightly when you do this on your actual device. It is a kind of parallax effect although I'm not sure why this is done. Anyway, just thought I'd share!