Hello,
I tried the jquery crSpline plugin (http://archive.plugins.jquery.com/project/crSpline), but I have some weird movement with the last but one coordinate.

The top property of the red point goes wild with the last but one position (something like -3000px).

Here you can find some code: https://github.com/xseignard/test-crspline
and the demo here: http://xseignard.github.com/test-crspline/

Do you see something wrong?

Or even better, since the plugin development seems to be dead, do you have an alternative?

Regards,

Xavier