Yes, I had the same experience with my Moda Charm Squares. It was very disapointing since after washing I didn't have enough fabric left to make my 2 1/2 inch squares.
After talking to other quilters, I was told that even if Moda is supposed to be so great that it will shrink just like the cheap stuff.
I prewash just about everything---no surprises that way.
(I also had Kona Red run and run and run even though it was washed several times with a color catcher. I plan to wash it with restayne (spelling?) that apparently sets the dye colors.)