I recently bought the Sony MZRH1 from amazon and i'ts the best move i've ever made, however theres one issue i'm slightly concerned about. When the MD player has been lying flat and played through my amp it has stopped playing half way through a track and you can hear the disc inside spinning and hesitating to start up again. I have to eject the disc and play it again. This has happened only twice and otherwise works flawlessly. The player is brand new and i have not dropped it. Is it normal for an MD player to occasionally play intermittently when at rest, or is this a real problem? Thanks