Right now, an animation file is limited to 250,000 bytes. This is very small. If your animation makes use of the body bones + fingers, you can rarely make an animation longer than 20 or 30 seconds with such a limit. Of course this also depends of the FPS and other kinds of things, but i've noticed that for a "normal" animation, animating the body and the fingers (not the face), in 30 FPS, i can rarely make an anim longer than 20 or 30 seconds because of the 250,000 bytes limit.
I propose to double this limit and make it 500,000 bytes.