alot of first gen consoles have problems and bugs, that's why I don't buy a console on it's realease, i wait till everything is ironed out
the new one don't have fans and tend to over heat, and yes, don't put stuff on your console, in fact, that place doesn't seem to be a efficent place to put a console on, consoles are like computers, you need to give it space away from other objects, I put mine in a sony tv shelf under where the dvd goes.
my ps2

(pretty big pics, so I'll do links)
http://i33.photobucket.com/albums/d62/Gt-racing/misc/Dscn0446.jpg
http://i33.photobucket.com/albums/d62/Gt-racing/misc/Dscn0447.jpg
lot of breathing spaces