I can't seem to change the animation speed (via an Action) for anything but the "Stopped" animation sequence. I've tested this on a new active object with no special properties (i.e.: no movement) and animation frames in the Stopped and Walking or Running and custom animation sequences.
If I change the animation sequence to walking and then set the animation speed via actions, the animation speed does not change, it always plays back at a set speed. If I change the animation sequence to Stopped, it obeys the animation speed values I give it and will speed up or slow down via my actions.
Think must be a bug? Anyone else noticed this?