I use my phone in the car for both navigation and as a dashcam. Prior to the kitkat update i ran the phone like this for an hour+ at a time with no overheat warnings. The phone would get warm but it never shut apps down or warned of overheating. Now after 5 minutes it says it is overheating and starts closing apps and the phone feels warm but not hot to the touch. This feels like a glitch to me unless the set the heat threshold much lower than in other versions.