I've been very careful not to point a finger at a particular app as a cause of random shutdowns (other than aggressive user settings within SetCPU). Before I continue, let me say that I believe there is more than one culprit responsible for shutdowns and that most are caused by non-app related issues. I've had my third device for 2-1/2 months. No shutdowns whatsover...until I installed LauncherPro last week. Then they started. I removed LauncherPro and - back to normal. I hereby declare an official suspicion that LauncherPro is one of the causes of random shutdowns. Before you react, I understand that many use LauncherPro with no problems. Great. I'm not saying that the app itself is poorly coded, but rather that it may begin a chain reaction in some devices that causes random shutdowns. I have not taken this declaration lightly. I waited a long time before openly stating my theory. I hope it proves of interest. Another thread titled " Random shutdown doesn't happen with TouchWiz" authored by android4rumuser served is the impetus for this thread.