I assume from the deafening silence that there is no way round this bug. Last nights render of 68 frames produced 23 splattered with these wretched black triangles. I am not overclocking any more. It does not happen every night but often enough to make me throw in the towel with this. There is mention on this thread of an older version that renders properly can someone post a link?
This really is a shame as TG2 terrains look better than anything else but it is totally useless for animation, at least for me.