Okay, firstly, it's JUST GIF Construction Set (not Pro, or Professional, etc. etc.), and it's also unregistered. (I doubt that's part of the problem though.) I made an animated GIF, but for some reason, one of the frames trails rather than just disappearing and going to the next frame. (To get a better picture of this, imagine when you use pointer trails on your cursor.) I see no cause for this problem at all...maybe somebody who has experience with GIFs..or this program..can help me out. (The attachment shows the animation. Maybe it's even just my computer that's doing it or something.)

Dog or wolf sitting, standing up, barking, sitting down, etc....
Looks OK to me.

Pfft...I guess my computer's just being retarded then. Thanks anyway though. xD

Works fine for me. Must be the program you are opening the GIF with.