This is the first thing I've really rendered in P7.  That's from the exported render too.  I used the 'default' camera because I didn't need anything fancy.  Poser 6 took FOREVER to render the same scene (and at a much reduced resolution too!  the original was 9" x 12", in P6, I dropped it to 600x800 LOL).  The artifacts were not present in the P6 render.  Quite frankly, I am starting to suspect texture filtering as I always have that off by default in Poser 6.  My poser 6 always froze with it on.  I'll post an update if that makes a difference.