It's hard to say without more details. I haven't seen this with 1.8.
E.g., I don't know if it's a one time error, just when he adds the fsm, maybe an edge case based on how he's adding the FSM... Or maybe he imported the 1.8 package but didn't install it from the Welcome Page so he's still using 1.7.8... need more details to figure out what the issue is since I can't repro here...