Scott,
After that dive I took a look at the weight pockets, and it appeared that the threading had loosened, allowing enough of a gap for the soft weight to come out. It was the third dive with that bcd, I had not messed with the ripcord system. Pocket was zipped shut. It wasn't a big deal, and I bought the weight pockets to further minimize any chance of soft weights falling out, and tightened the threading. The gap wasn't that big, and the fabric of the soft weight was quite soft, so it could conform to a small opening. Compared that to some new soft weights I had just bought, which used a much stiffer fabric, which probably would not have fallen out.