I uploaded a GIF, it's in the dimensions limit and it's just froze on one frame. Everything I tried did not work. You have no idea how frustrated I am at this, please help! My GIF is 150 x 115.
Something else to mention is that it takes the forum awhile to completely upload and animate your GIF once you do get it in the right dimensions. This is from my experience, anyways.
Your avatar needs to be 100x100 pixels or less to be animated. Then, it goes through a special process (Which may take a little bit) before it's animated.