Ooops. As I quilted on my quilt ( pictured below), I found three of the squares in the center portion were put in backwards. I looked at it a long time thinking that it wouldn't bother me. Ha! So finally ripped out some of the quilting, ripped the squares out, turned them around and hand appliqued them back into the quilt. It shows up in the picture below. The mistake is in the upper left hand of the inner part of the quilt. Where it shows up, there is a light square in the dark row and a dark square in the light row.
Oh, well, it's fixed and I've requilted the part I had to rip out. Certainly not getting it off the machine quickly.