I had some problems with skipped stitches a while back. I even tried two different machines and still had the problem - and come to think of it, it was on white on white fabric. I ended up getting some other thread. I was using all purpose polyester thread made by allary corporation that I think I bought at Walmart, thinking it was Coats and Clark. I changed to another brand of thread and bought some Schmetz nonstick needles at the suggestion of "quilted sunshine". It worked. I finished the quilt in time for the baby, even though it took forever to get the needles from Amazon. If you do this, run the needle on scrap fabric for a while, as it leaves a tiny black residue for the first few feet of sewing.
bkay