OK, so it's an old thread. It kinda applied to me... except that I have an HD, not a regular Kindle. I'm just glad, cause it helped me identify which really WAS the top. If you're in landscape mode, it's easy, cause the camera's on top, but if you're in portrait mode... As it turns out, the power button is on top along with the headphone jack.
I could tell, cause when I turned it off and back on, it said, "ǝɹıɟ ǝןpuıʞ".
