I set up an advanced exchange today for my Surface that may or may not have been related to firmware. I was experiencing keyboard issues and the device was short circuiting. We investigated the functionality of my surface and are undergoing an exchange to replace it.
For anyone with a faulty cover, or who has the botched firmware, be careful not to:
* Leave your device in a sleeve or anyplace where it might get hot if it gets stuck in a reboot cycle
* Do NOT leave the keyboard plugged in even when your device is off (this short circuiting I experienced was likely caused by this)
* If your touch cover experiences periods where it sometimes works and sometimes does not work, unplug the cover and call Microsoft
* If your device takes a long time to turn on from sleep, you may be experiencing a silent BSOD (listed as kernel-power or kernel-general in event viewer), and you should hibernate your device in the future instead of sleeping it
One other minor issue that I've personally noticed but don't know if it's a problem as of yet. If you notice that:
* Your stylus is noticeably offset from your screen even after calibration
* Your screen flickers
* When your surface boots you notice that around the perimeter there is significant lighter regions on your screen
Then I think your screen may have been installed either at a slightly improper angle or incorrect offset. I have noticed these things with my Surface Pro 2. I'm not sure how common each of these symptoms are.