Does anyone have any idea why Vegas (and some other NLE's) sometimes just randomly remove transitions on events? When I check through my projects sometimes the fade at the beginning of an event have just disappeared.
Ho! This is a pain. I'm a sloppy editor . . that's a given... I've had to be very hard on myself to ensure I'm doing the job correctly. Maybe you need to experiment with Auto Ripple. This is a really neat function that helps keep me "on track". Having this set "ON" means I can push and pull events and all the trannies and marklers etc, stay where I originally put them and move with the work I'm doing. My guess is that you're maybe pushing and pulling events to and fro and undoing the good work you've done. Now, if you've used Auto Ripple, and are still getting the same result then I don't know . . .
Sometimes transitions "disappear" because the events they are attatched to are moved a little. One thing to check is the little icon on the far left of the track header. That will make the A and B track visible, and then you should see that the transition is still there (hopefully).
Tor