Quote from sp614x
This looks like a driver problem with Multi-Core Chunk Loading. Disabling the "Threaded Optimization" only helps with flickering chunks. In this case it looks like the driver gets confused when accessed by several threads at once. Upgrading or downgrading the driver may help.
Downgraded my Graphics Driver. But It did not help.
Lighting Glitches with the RedStone Lamp are still there.
RedStone Lamp is constantly on and off btw.
However, Opening Doors do not seems to have any problem anymore.
nViDia Driver: 314.22