Kropki Fillomino. Follow regular Fillomino rules. In addition, Kropki circles appear, although not necessarily all. Click above for better rules.
UPDATE 02-Jan-2013: Blargh. First, a non-unique puzzle with unknown amount of solutions. Second, a non-unique puzzle with 11 solutions. I hope I managed to reduce the number of solutions in the second puzzle by 90.91% with the addition of a circle.
Medium-hard, after erring twice. Blargh.