Expired UV Codes - Still Working, Except Sony?

[callahan09]

I just decided to go through my collection yesterday & today and do what I've put off forever: add each movie to my Blu-Ray.com collection, and redeem all the UV codes.

The interesting thing is that there are a LOT of expired UV codes among these discs, and so far ALL of them have worked with the exception of the ones from Sony Pictures, of which NONE have worked.

Is this known information? Seems that Sony's expiration dates are actually accurate, but nobody else's seem to be.

Is there any way to redeem the Sony expired codes? I highly doubt it, but I figured I'd ask. I think it's just two movies for me so far: Drive and Monty Python and the Holy Grail.