3.2 content + old webplayer = animation weirdness

I’m not sure what the issue here is. But I updated some content and built with the new Unity 3.2
Now when someone views the content all the animation is broken. If they un-install Unity webplayer and re-install then all is fixed.

Does the Unity player auto-update properly as required?
Is there some bug?

no one else have issues like this?