I am stuck. Please see the attached and note - everytime i get to the part where i do the mouth and snout, the inside of the mouth disappears when i convert to nurbs. I restarted the tutorial several times, attempted several work-arounds to no avail. Can someone make any suggestion? I reinstalled my program with no change, get the same result with the PLE, and on someone else's maya program as well, so it is something i am doing / not doing. Any suggestions?