What is going on with this socket?
This is a light fixture on the bottom of a ceiling fan in my girlfriend's apartment. I wasn't able to screw a light bulb into the socket, so at first I thought a bulb might have broken off in the socket, but after a closer look, I think that is not the case, and the socket is fine. However, I just cannot screw a bulb into the socket. It seems to be just a little too small - which is why I originally thought the silver part was actually part of another bulb that had broken off. Can anyone take a look at these two images of the socket and tell me if you see anything wrong? There appears to be a gray cardboard or fiber washer in the middle of the socket. I'm guessing that is just there to insulate the two contacts of the socket from each other.