Yes! That's exactly it. It happens to me daily though, but then again I do listen to music everyday for hours at a time. But now my screen blinks when it does it, which just started happening. It also seems to be happening more frequently, instead of just once a day =/
I've contacted Sony and they told me to try a reset, a reformat, and/or to upgrade my software. All of which I had already done before they even suggested it. When I told them I had already tried it all, they didn't really know how else to help me, other than to send it in to exchange it for a refurbished one, which I have yet to do....