Perhaps I bought CFL's too long ago and they last too long.
The switching mechanism on my Clapper has always worked, but when the switch is in the "off" position, the light flashes on dimly every few seconds. Not good for the bedroom, and probably not good for the life of the bulb.
This same "bug" prevented my father from pulling a prank on my mom's friend who was staying in from out of town. He was going to hook up a timer to a strobe light so that it would go off in her room at midnight. But it would flash once every few minutes.