Well, I'm in the middle of quilting this and something has come up. Where the piano keyboard is is some of the prettiest stippling I've done yet except I used black thread on the top and beige on the back. Where the black keys are you can see little dots of beige in places. I used different color matching thread on this top and this is the only place that the stitching came out different. As though I changed the tension. It is a different fabric, which may have something to do with it. If any of you have had this problem, did you leave it or take it out? That is what I'm trying to decide.