Problem with dynamically moving a sprite along a curve

[Jake]

Ok, looks like the tangents flip once you add CPs behind the sprite, right? I can't think of a way this could happen unless you flip the spline's direction, but I'm sure we can sort this out. How do you exactly add new CPs?

Is it possible to export this behaviour as an example scene (either posting it here or by mail to jake (at) fluffyunderware (dot) com)?