Bug in importing animated GIF

Hi

I've had trouble with this for a long time. When I try import an animated GIF file and select transparency, a colored box sometimes colors the outside of the object I import.. Like a thick frame. I get a transparent square with the object I want, but outside of this square, its some colors. This doesnt happen to every frame, but most of them. And sometimes when I import a GIF, this issue doesnt happen at all. Whats wrong?

Never mind, its stupid Photoshop that ****s it up. Its some kind of option. Gonna ask on photoshop forum.

Let us know if you get any answers that help - I don't think I've seen this in my own projects (I tend to draw in MMF directly).