I updated Pro and that did not help. However, I rendered the timeline and the transitions are now behaving as they should. But do you have any ideas on why this is causing this? I don’t have to render on my other computer for the transitions to not misbehave…do you suppose my hardware acceleration is off or something else within my computer? (it’s a brand new HP Intel Core i7-2600 CPU with 8GB ram and 64-bit Windows 7 operating system)