The script that runs the clearSafariCache shell script fails to clear the Safari cache:

Just purchased Cookie 5.  I find that if I select "Remove Safari Non-Favorites", nothing happens.  That is, the menu doesn't become greyed-out, as I would expect if it had successfully removed such items, but is always available for selection, making me think that it has not removed them.

Also, selecting other items often causes the system beachball to appear, which never happened with Cookie 4.  Why is this?