Patrick Rost found a bug in the spline_path object (actually a crasher). This is on all platforms. Basically, if the input to spline_path is >= 1.0, then there is some seriously undefined behavior which wanders around memory (there is an error in my knot logic).
I hope to have a fix for this in the next day or so. Until then, just clamp the max input value to .99 or something.
Later, Mark