I had the same situation described in comment #12, and changing screen resolution, even down to 1024x768, didn't help much. It did reduce the flashing and black screen, but not enough to make it really usable. So I think that reducing screen resolution makes the problem "less bad", not actually better.
That having been said, with the latest (as of Aug 29) updates, the black screen and display artifact issues went away, and when Compiz crashes, Unity manages to restart itself after a short delay, so the machine isn't completely unusable.
I had the same situation described in comment #12, and changing screen resolution, even down to 1024x768, didn't help much. It did reduce the flashing and black screen, but not enough to make it really usable. So I think that reducing screen resolution makes the problem "less bad", not actually better.
That having been said, with the latest (as of Aug 29) updates, the black screen and display artifact issues went away, and when Compiz crashes, Unity manages to restart itself after a short delay, so the machine isn't completely unusable.