(I’m not at the FCP machine right now – it’s a friend’s computer.)
Does it make a difference if it’s in Safe RT or High Quality, if PNG files with transparency work ok but the GIFs don’t? (The PNG files apparently use “Straight” mode and the GIFs use “Pre-multiplied”). Does changing those settings (Safe RT and HQ) affect whether transparency shows or not?
The animated GIFs display properly (i.e, the animation, uh, “animates”) but the backgrounds don’t go transparent. The GIFs were purchased so we can’t do them in a different format. I know the GIFs have transparent backgrounds because I can drop them into Vegas and they show as transparent.