Has anyone gotten the "Interpolate bone animation" feature (under Manage Frames) to work? After several frustrating attempts, this is what I tried:

- I made a very simple model of two elongated cubes and hooked them together with a single bone.
- I made two key frames of animation and in the second one, I used the bone to rotate one of the cubes by 90 degrees.
-Then I added another frame in-between the first two and checked the "Interpolate bone animation" box.
- Now frame 2 should have the rotated cube at about 45 degrees, in other words, the angle should be about halfway between where it is in frame 1 and frame 3.
- But frame 2 looks just like frame 1!

If this super-simple test fails to work, I'm starting to wonder if this feature works at all. Or am I doing something wrong?