Yes that is true. My laptop started shutting down with a "Terminal
overexposure" message every time is on longer than an hour, a year after
I bought it. I run OpenBSD, but a friend of mine has exactly the same
laptop always running Windows and has the same problem. Need to keep a
book under it, there by giving the heat more change to escape. Now I can
still use it, longer than 30 minutes. To use it really on my lap, is
impossible, both my lap and the top will burn ;)
- ls