I started a show that had 95 slides in it. I thought I would change the transition on 10 or so of the slides so that not every transition was the same. I made the changes and when I went to play it the first slide transitioned using a Mosaic dissolve. I hadn't changed that transition. So, I went and looked at the transitions on the other slides and PTE had unilaterally changed all the transitions (other than the 10 I changed) to: Default Transition With It's Own Time, somehow using Mosaic. Prior they were all set to Basic Transition-Dissolve. I had to go through the whole show and change all the transitions back. Not very happy.