Prop probably was an early version as this happened about 1999 or 2000 and his was the first one of those I'd seen at the time.
The blade actually broke off just below the hub, not the hub. He did have concerns about the hub having too much "play" in it after a short time in service but there was no way to remove the excess play. Did this cause the blade to fatigue and depart? Not sure. Was it a bad blade? Either way that was enough for me to look elsewhere for a prop.