Finally got around to watching this last night (bought the 4K digital on iTunes when it dropped to $14.99) and with subtitles on, it probably made more sense on the first go round than it would have in theatres. I concur with everyone who says the dialogue is mixed far too low in the mix. As for...
Not 4K, but my first Blu-ray of The Dark Knight had a manufacturing defect that was visible through the disc surface. Manufacturing defects are rare, but they do happen.