Before I upgraded my Omnia 2's OS to WM6.5, I am already having problems with my Omnia 2's camera. The error was "Camera Sensor not detected' I think - I already forgot. I thought after it was updated to WM6.5 it will be fixed but I was wrong.
After installing the WM6.5 update the error changed to - Please Update Camera Firmware.
So have you encountered this, if you did and you have solved it please let me know. I will do the same thing as soon as I solved this issue on my Omnia as well. Thank you very much.
UPDATE: (March 1, 2011) - I have searched all over the internet for the best solution for this and sadly there is no other way but to bring your device to Samsung Service Centers. If you are in Saudi Arabia, you'll find the service centers on the link).