For the rest of you, if you buy one, throw away the plastic mounting bracket. It is useless. You would think someone would have told the folks at Kryptonite by now...
My mounting bracket worked perfectly fine with no issues.. I think it just depends how you mount it. I just stopped using it because the lock rattles and is annoying, then I put a frame pump where the lock was, so just took the mount off entirely.
see here for mount position that works (old pic)
http://www.flickr.com/photos/bhop73/3153013618/sizes/o/