First time I've gotten this alert. Not rooted. Was in dock all night. Pulled it out of dock and within moments I got an alert I've not seen before, in the status bar. I went to the task manager to see what it was all about and the OS was using 54% of the CPU. Moments later it jumped to 80+ percent. WTH? It kept moving between 50-ish and 80+ from moment to moment. I ended up shutting the phone off and restarting it. After doing that, no more alerts, but the first time I checked the OS following the restart, it was at 27%. Basically, it's now using a minimum of 16% and sometimes more than 25%, but never more than roughly 30%. IS THAT NORMAL? oh, and as a test, I put it back in the dock for a moment or two, took it out, and no "high CPU usage" alerts.