To tell you the truth, my player has been in some hot places left for hours and no problem except the slipping vol. button.
What I'm worried about isn't the too hot but too cold. I'm more worried about the disks freezing up since the low end temp advisory is only 40`F and it gets close to 0`F around here. I didn't seem to have any problems last year but it was pretty mild as far as cold temps. go. any problems with disks locking up?