Haven't seen anybody post this problem or maybe I missed something but, has anybody gone through there songs, clicked on a song/ringtone, and it doesn't play? Like, no window pops out saying "corrupt file" or any of that sort. It just doesn't play. And if its a video, the video plays, but sound doesn't come out?...or sometimes the videos don't play at all? I've pulled the battery, and it works fine after that, but maybe for a couple of hours it'll stay that way and then it'll go right back to pushing my button.