Steve, when I was watching Simply Quilts this morning, they were using some double (?) pins that would snug in on either side of a seam. They looked a little like a long staple. Alex's guest said she first pokes a pin straight through the seams to make sure they line up, then puts the double pin in to secure it. They said the pins should be available at quilt shops. I don't remember seeing them at JoAnn's, which is where I usually buy my fabric. I'm going to look at our quilt shop next time I'm in there. I have the same trouble with my seams on long rows and it is quite irritating!