Originally Posted by karenpatrick
It doesn't look to me like you achored your back good enough when you basted it all together. Did you pin or tape your back down first before you added the batting and the quilt top? I haven't found a basting spray that I like yet so I pin baste. I doesen't look like you basting is close together enough. I pin my backing to the carpet with t-pins to anchor it taut before I add the batting and backing and then pin about every 4 inches. Hope this helps.
I basically do it this same way after I screwed up a few times. I use painters tape and tape the backing to a large dining table and then use quilting safety pins to pin all together. I don't think I've had a puckered backing since I started doing it this way.