I found the real answer, it's easy and quick. It worked for me.
1. Go to the apple in the top left corner of you screen
2. Click "Software Update"
3. There should be some updates with the java and such nothing spesificaly refferring to FaceTime
4. Once you have installed the update (no rebooting requiered) go to the apple in
the top left corner of you screen again and click "Log Out (your name)"
5. Then log back in
6. Open FaceTime
7. log in
Now your Done!!!!! simple as that no re-installation, re-booting, or hardcore encoding!
email me if u have any additional questions