Anyone could fix it: you need to export the storyboards in Flicster, replace the backgrounds with the last colour on the palette, and then turn them back into flics. Not difficult, just a bit tedious.
This does, however, demonstrate the importance of testing your creations in-game before posting them.
Now we´re talking unit creator language.... But for starters I look at flc-files in Civ3FlcEdt so since I'm very lazy I still don't see where I get a Storyboard from. Is that just in Flicster or what...
I give it a try if no-one beat me to it...