In order to get a better system response when editing AVCHD clips I tried rendering to cineform intermediate files.
On my desktop computer I get horrible artefacts as you can see in the screenshot:
http://rapidshare.com/files/172733540/Cineform-Render-w-artefacts.jpg
What could be the reason for such a behaviour?
BTW, when I do the same rendering on my notebook the result is fine.

TIA
Boris