Originally Posted by
leighway
What's the secret? Or, is it really that most quilters have this problem?
The secret is the plate on your sewing machine. There is a tiny lip where the metal throat plate meets the machine. If the seam is laying toward you it will feed through this area fine. If the seam is laying toward the needle, when it hits that lip it will catch just enough to turn the way the seam lays and you end up with the seam (or sometimes just half of it) sewn wonky.
The fix is to put a piece of tape over the edge of the throat plate to smooth out and eliminate the little lip or bump up.