UPDATE: This issues looks like it's fixed. I re-formatted the SD card (after kitkat reported it was corrupted) and now things seem to be back to normal. I'll report back if there are any more problems. Good luck!
I used to be able to run navigation, music and dash cam without any issues prior to kitkat. After the update it forces shut down of all apps due to overheating. And just this morning it told me I had to format my SD card. I'm not happy.