Just got the update last week, just tried raking a picture and my camera doesn't work. What the hell?
Did you reboot? Sometimes an app like flashlight takes over the camera activity and refuses to let it go. Other apps like Camera will not be able to access the activity until the first app releases the lock. Force closing does not solve the problem. Only a reboot seems to work in this situation.
I'm guessing flashlight is the problem, since the exact same thing has happened to me several times if I didn't close the flashlight app properly after using it.