Quote - Is there any reason you can think of that this might be an intentional part of the coding?

I can't think of one; which is not the same thing as there not being a reason, of course.

When they fixed the light keyframe bug, did they deliberately leave the figure keyframing, or had it just not been reported? I imagine that very few people would even notice it, and fewer still would be troubled by it.

Quote - It seems a bug report should be filed with SM. Multiple bug reports on the same issue will get their attention faster if it's indeed a bug. Maybe there's a setting somewhere that's being overlooked.

I agree, but it should probably be done by users who have the latest versions. I doubt I'd get far submitting a report on a version that's three behind!