We're just about to release a game and have discovered that we've got missing triangles from some of our skinned objects. We've only seen this on 3450 and 3870 cards despite extensive compatibility testing. Searching the web I've seen other developer having similar problems, here's a link (http://www.titanquest.net/tq-forum/threads/43236-Triangular-holes-missing-polygons-glitch). We've tried older drivers to no avail. Does anyone know what is happening here? Perhaps we can work around it in code somehow?