Ive never had any problems with walmart fabric. I have heard the same that Chicago01 is informing us but I have never personally prewashed fabric, but too I allow for wider seams. This is great fabric and Im going for it :)
Actually,You probably know more about it than I do.I got this BIG idea to make something and well that never happened,So here it is on Listia LOL...Good Luck and Thank you:)