A small patch has been released for the RT.X2 which adds accelerated export of Matrox AVI files and fixes a few bugs. It's definitely worth having. There is only one rather silly little problem, the new presets always add 5 pretty useless 5.1 submix tracks to the timeline, so we suggest you copy their presets and make your own without this, or delete the submix tracks whenever you start a new timeline.