Quoted from Skyemont:A rubber is NOT suppose to be there. Just the post.
Ok, thanks for the quick responses guys!
Check this out what happened last night. I almost started freaking out because the glass would only come down so far then the ball would wedge in there and prevent the glass from coming down anymore. We ended up having to lift the front of the game up really high then while it was up I pulled the glass down as far as it would go then I slid it back up real quick to get the ball loose. I think the metal guard wires aren't adjusted up high enough or I think it would have prevented this from happening.