After upgrading to 2.2 my camera and camcorder both would not launch. I searched the forums and found the solution by Mark One on this post...
http://androidforums.com/htc-desire/138992-froyo-camera-camcorder-not-working.html#post1283490
I uninstalled the LED Light widget and that solved it for me.
Thought others would be interested as well.
http://androidforums.com/htc-desire/138992-froyo-camera-camcorder-not-working.html#post1283490
Culprit for me was: LED Light Widget 1.0.9
Uninstalled this and camera working normally even after reboot.
I uninstalled the LED Light widget and that solved it for me.
Thought others would be interested as well.