At first, my husband suggested that I not worry about them, after all, it is just another utility quilt for him, another blankie similar to his first one. The problem with that is that he turns the front of the quilt -- the pretty flannel side -- towards himself, and so the backing is always visible, because he likes the softest side next to his skin. So I will continue to rip out the quilting in those areas until all of the pintucks are gone. It is slow going, because ripping out quilting is a lot more time consuming than ripping out seams from piecing. I have to be very careful not to rip the fabric as I slide the seam ripper under the quilting stitches.
Part of me wonders if I might have been finished by now if I had hand quilted it in the first place. I think I'm going to hand quilt the rest of it, once it is ready to requilt. That way I'll be able to avoid those nasty pintucks again, and he can finally have his new blankie sometime in the near future.
Edited to add photo - this is just a small sampling, unfortunately. :( I have to rip all the quilting stitches to the edge to be able to fix them.