The 4K will probably emphasize, even more than the Blu-ray, how diffused and in soft focus are any of Cary Grant's close-ups. It's like they were filming Garbo or Crawford ! Garnted, he was about 55 at the time and his character was probably supposed to be in his late 30s
I was thinking the same thing. The packaging pretty much forces you to touch the disc, and for many of us, a cleaning on the disc eliminates the problem.
My copy froze and pixilated at that same spot. I took the disc out, cleaned it with this Mobile Fidelity disc cleaner I have, and then it played back perfectly.
I don't know for sure, but I'm wondering if the fact that you actually have to touch the disc to get it out the packaging is causing...