No, there are entire CG images that are just black or missing for me (after multiple installs, too), and it happens both when playing the game and when looking at the CG in the gallery.Did you watch the video of the new content? There were no missing CG or black-screens. The bar (not the Fox club) was missing a background image in v0.89.8a - the developer states it has already been fixed for v0.89.8b. I think I played through the area you said last night that you saw a black screen, it was fine for me. See video below:
For example, the third out of the four new Natalie images (numbered 1473) is just black.
1484, featuring Becca and Pri as well as 1487, 1488 and 1489, all three featuring Tiffany are also the same way, just to give more examples. There are many more missing for me as well but these are the ones I found at a quick look.
Oh and about that Darnell scene/quest, it apparently worked just fine when I had progressed much further into the game. It appeared very early when I started a new game, at around 10% done or even before and my wild guess is it just becomes available too early and the game is missing some flag or dependency or whatever and so the game locks up. I think it ties into the new Tiffany content somehow and none of that is established early in the game.