Just completed bock 2 by Vickie Eapen through the Layer Cake Quilt Along. I mistakenly grabbed some solid brown fabric that I had in my stash and was done making the half square triangles (HST) and as I was pressing the seams open on the last one (of course it would be the last one), I noticed the others were shrinking. Upon closer inspection turns out that solid brown fabric was not 100% cotton, still don't know what it is. I had to make the HSTs all over again. I would have been finished and onto block 3 earlier today. Oh well you live and learn. Enjoy.