There are definitely some popping issues in animations and cutscenes, I've found - especially on starting a cutscene. It would be really nice if they faded out and loaded them quicker instead of Geralt just approaching a group of people that all turn to face him, blankly, and then 5 seconds later the HUD/camera view finally fades out. The transition should be much tighter.
There can also be popping animations in combat, but that is generally due to mis-timed combos and is intentional to show you've broken the combo chain. Unintentionally, you can run into the combo chain issue when Geralt tries to walk through enemies to get to another one, or one runs in the way during an attack, or the enemy is on a different Z axis.
In all, though, my nitpicks with the extra polish that could have been applied to the cutscenes and animation are just that - nitpicks. I'm enjoying the game.
Oh, right, Hellgate: London.