AnimGif display is having shades of the previous image

Hi,

I'm using UMUI wil default blue background. On display of the animation ,the first image in the gif appears good.When it transitions to the next , I can see the ghost image of the previous in the background of the second and so on .
Is it some problem with the image or the UMUI .
Because I tested the GIF image in the Internet explorer , it played fines without any distortions in the background.