My 2010 17" model will get corrupted graphics and eventual a full kernel panic due to issues with automatic graphics switching that are usually triggered by Safari+Flash. Uninstalling Flash, turning off automatic graphics switching, or just using Google Chrome for Flash sites fixed that.<p>My first-gen 2006 Macbook Pro used to crash under heat/load as well, which was suspected due to misapplication of thermal paste. I sent it into Applecare a couple of years later and they took care of it (even replacing my scuffed up shell).