I ran it on 2.41 and 2.42a, version 2.42 is buggy from what I was reading on the blender boards, so they release the “a” version to fix some stuff.
Yeah I’m not doing IPO animation. So you may be stuck there again 
. Although from Panda’s scene editor movie they have something called motion paths you can setup from within their tool. It might be something I get around too. I probably need to find a good Blender IPO tutorial, to see what its all about.