A new movie maker came out called "Windows Live Movie Maker" which is the first in a new series, this one being made from scratch (again). I've experimented with it and found that it reads .gif images as if they were still (but WLMM can still read .mov if you were wondering). I've contacted Microsoft's "Live"division about the problem, and they gave me a caned answer. I hope in newer updates they will fix this, but for now I'll stick with Cyberlink.
You can download WLMM from this package: