yes i've had this happen a couple of times. Its pretty funky. i just had to do a batt pull which i prob end up doing 3 times a day for various problems
I have a similar experience. When using the keyboard, when you linger over a key (without clicking) you get a list of accented letters associated with that "key". When I use this feature, or accidently leave my finger over a key to long, the camera comes on and I can't get back until I go back to the main screen. I have reported it to Verizon.