[MaxMustermann]

I can also confirm the black artefacts are gone. thanks guys!!   

I'm still having the artifacts. It's noticeably better with 'limited color range' turned on, but the artifacts are still there.
Here are some images and the log file. I hope you can find a fix. #0205 was the last version without artifacts.  

 Could you please post a sample? 

 Have you seen my sample? Do you need anything else to be able to help me?