Page 1 of Philips dvd763SA overheating problems

I have recently purchased a Philips dvd763SA.

Whilst I am totally satisfied with the picture quality and sound, I have found that after about 2 hours of use the unit overheats and I get bad picture and sound breakup. The unit also becomes extremely hot. I have my ITV Digital box on top of the unit and removing it lessens the problem.

Has anyone else been suffering these problems. Should I request a replacement or should I buy a totally different player?