I've come across this issue on numerous occasions over the years. Haven't worked much with flash recently, until this project landed on my desk a few days back. Converting fla files to SD video (for DVD).
Often it seems to me, that the mov files I end up with, are less smooth. If I do a frame by frame playback on a dissolve i.e. - the dissolve is irregular (I hereby mean, that a dissolve could animate for the first 2 frames, followed by a freeze frame, then animate again for the next few frames, and freeze again - causing the overall playback doesn't look as good/smooth)
Has anyone got a best practice for this procedure? Dos and donts?