SUMMARY Rotation operations should look at last keyframe and decide the shortest possible path to reach the destination rotation. This should help control rotation direction intention. STEPS TO REPRODUCE 1. Try rotating left or right on a new key. 2. Observe how, occasionally, leftward rotation is ignored in favor of positive-only movement, causing an inverse rotation. EXPECTED RESULT Rotation should always go the shortest distance possible when animated, if possible.
Someone else posted a bug regarding this as well, I will close this one, despite being here first. :) *** This bug has been marked as a duplicate of bug 438343 ***