Under My Profile, there is a place to set your preferences. If you click on that, there is a list of options. Down towards the bottom there is a choice to view users pictures in their profile, and another to view pictures in posts. Do you have both of those set on "yes"? I don't know if that is your problem, but might be something to check. Do you see the pictures, but they just don't animate? Is it just here, or can you see animations on other websites?

<font color=orange>"Never forget: 2 + 2 = 5 for extremely large values of 2."</font color=orange>