Frank Farwell said on 25/3/2003: >Air being thinner the Powerbook will not cool as efficiently - >possibly overheat- this might be one reason. The Kbase article that covers this has this to say about using a PowerBook outside of its recommended altitude limits: "On PowerBook computers, when altitude limits are exceeded, the principal risks we have observed include general operational problems, hard drive problems, and the possibility of screen cracking." <http://docs.info.apple.com/article.html?artnum=9504> -- Javier Pedreira "Wicho" <wicho at casaciencias.org> Museos científicos Coruñeses (=mc2) <http://www.casaciencias.org/> La Coruña, Spain 43°23'N 8°24'W