I've been troubleshooting my MBP after post ML upgrade. 16GB Corsair Memory with Crucial M4 SSD. Nary a hiccup with Lion, at least 2-3 lockups per day after ML. In looking at temps, I noticed that the *default* RPM speed of ML is 2000RPM versus the *default* RPM speed of Lion is 4000 RPM. Anyone else notice this. Still debugging, monitoring temps, etc to determine the root cause of the lockups.