@Tester Scott
Keeping it at 5 seems to keep it mostly fine through scene changes. Still have to jigger it every time you start the game though. And I did still encounter corrupted graphics at one point - no missing walls, but some objects turning strange colors, violet, green and the aforementioned black.
Again, it's bearable at this point, but a genuine fix would be nice.
God, I sound so grumpy and demanding... The game itself is really good so far, though. Which is why I'm so anxious to have it running at 100%.
ETA: Oh yeah, I assume the load screen is supposed to show a screenshot?

Not so much. I'd guess this is connected to the other thing?