Sorry for attaching the wrong log-file initially. But in the meantime I've fixed the issue I had with the dash -> bash workaround. So the driver installs now.
Unfortunately the black window (situations when vid-mem is running out) issues still remain with this very beta-driver 1.0-9742.
Since I'm at the Ubuntu Developer Summit right now and some of the nvidia Linux-driver folks are supposed to show up here today I'll gladly file the bug personally and demonstrate it live