[Frodwah]

gday
it could be something to do with the codec ur using. not all of them do transparencies aye.
mov’s outputted with the indeo video codec (i use v4.5) can handle 1-bit alphas. 1-bit means that the alpha can only be two colours (black or white) so u can only have transparent or not transparent. umm so u dont want any gradients in the alpha.
ive heard theres other codecs out there that can do 8-bit alphas, but i havnt tried these myself..
you’ll find the option to turn the transparency on at:
File/Export/Quicktime Movie
then in the menu that comes up, click the Settings button for Video. Choose Intel Indeo Video. Click the Options button, and in the Transparency pulldown menu, choose Alpha Channel.
hope thats some help.