When I download an animated gif and open it, it runs slower then normal. Also when I make an animated gif in ULead Gif Animator (5) then I can never make a smooth animation (with tweening) somehow.
Look at the samples below.
Original (follow link then choose H.Simpson):
How come? I can't figure it out.
Another example. The moving block should move smoothly. But it doesn't.
In preview mode, it works great...
Feel free to download this gif and observe it when opening in an animation tool, to check it out for your self.