I've been trying to make a gif with a transparent background, however I've been having a few problems with it.
While the gif does start fine and the background is transparent at the beginning, after a few frames the background color would come up and then after a few frames more it'll be transparent again, then colored again.
It's really troubling since I've been stalking every forum I could find on the subject, however my research had deemed fruitless.
The best I could find out is that when I change its palette on the 'Publish settings' to either Web 216 or Web Snap Adaptive--the background stays transparent! However in return, the colors of the gif turn really ugly. The only palette setting I could go with that won't ruin its colors is 'Adaptive' of course, but I really want it to be transparent and it would absolutely not give me that choice. The other option for the palette choice is Custom which also makes the background transparent--however I don't know what palette to use for it since even if I chose the photo itself as a palette resource the colors still come out undesireable. I'm not really sure what the best 'palette choice' is for custom. (do you have a specific file to use for that?)
Anyways I would love it if I could get some help figuring this out! It seems simple enough, but I really can't for the love of me figure it out.
Normally in transparent GIF creation only one color can be used to define the transparency. It sounds like somewhere along the line your background color is changing such that it no longer matches the transparency color.