www.makemkv.com

Those of you who purchased the 4K collection for Rocky 1-4 may be aware that they have significant issues. The most severe of which is that Rocky II has the entire soundtrack pitched up by about 2%.

Because of this, Warner Brothers has a disk replacement program where they will send you the corrected disks if you prove your purchase.

I have submitted my dump for these replacement UHD disks (which will very likely be the same disks included on the forthcoming six-film 4K collection)

All discs confirmed to open correctly now - thanks for the quick turnaround.

As mentioned, I'm sure these will be the discs in the forthcoming 6-film collection, so you're ahead of the game.