At this site there is a very cute example of an interactive animation. If I download the PDF directly, it works fine in both Adobe Acrobat and in PDF X-change viewer (the latter is my preferred pdf-program).
If I download the sourcecode and compile it in Texmaker, it only works in Adobe. In PDF X-change the animation/figure is invisible.
The same applies to animations I create myself by looping images etc.
What is the reason for this?