waterdrop transition missed in 9.0.8

I upgraded to imovie 9.0.8 fro mountain lion, but in this version i missed the water drop transition, which is no more in the browser. the strange thing (which make me think it's a bug) is that the transition's icon between the two photos i had put before the upgrade, is still there, showing the drop, but when i play the video, imovie shows me a black screen instead of the transitions. does this happen to you too?