From the limited testing that I have done so far(I only got it yesterday), it appears to have no problems. I am now undertaking the major (horror) task of reinstalling my Characters to Poser 5. I am doing this to make use of the subfolders in Poser 5 to get (hopefully) control of the mass of MAT files that now fill the pose folder in Poser 4. With any luck at all I well be done by the new year and still mostly sane!!!!!