Happy,
Are you using an even feed foot? Are you doing straight line stitching? I used to have this problem a lot. This is what I did. When I baste the quilt, I tape down the edges of the backing. Start from the center and work your way out with the basting. Then, when you do quilt, if you are doing stitch in the ditch or straight line stitching, make sure you are using an even feed foot. It made a huge difference in my backs when I did all of this stuff.
Good Luck!
:wink:
Robbi