"Save a copy" does not run the JavaScript defined for AA WS/DS

I'm displaying the pdf in browser (IE) and need to audit the user saving the file (e.g. from the floating toolbar's "Save a copy"). However, the script inserted to run on Additional Action Did Save/Will Save is not invoked (the script and the structure of the document are ok because I'm doing the exact same thing for Did Print and works just fine).

So it looks like "Save a copy" is not "Save" .

Any idea on how to work around this?

Thanks,

Radu