I was able to capture a video of the "tearing" as well, here is the frame(s) that it happens in on both the source file and the actual playback on catalyst. It is somewhat subtle at times but on videos with more motion it is more noticeable.
I have files that run on the exact same machine that have double that data rate that run fine, they just don't have any fast motion so I don't see it.
This is with 1 layer running, plenty of system resources showing on the meters and no apparent frame drops. In testing I could play back I think 6 layers of this file with no frame drops.
I have more pics if it's helpful.
Any news on the Mavericks patch?
I just had to replace my Mac Pro and the new model won't run osx 10.7 or 10.8!!!
Although it is not a show computer I do use it for pre vis and programming and we start production rehearsals next week!!
I am sure Richard will post the link to the download when he is happy for it to be used on shows.