I've had no problems with Melodyne since updating to their last update, but have been reading now for many months, people who do. Definitely seems to be system dependant, but I agree, there is a problem. I can't get over the fact that it DID give me so many problems before, and still do the same as others here, and bounce each and every region effect once I've finished working on it. I never work on the recorded material, always saving as a new version after tracking is completed. I never export/bounce down a mix that has any open Melodyne regions. I just get no issues with these methods, so accept it as part of my workflow, and suggest you do the same. Melodyne is pretty darn good , so it's worth the workarounds. It doesn't look like Celemony are going to do any further updates in a hurry....