Something in the latest Apache or PHP releases causes Spackle updates to fail. After much trouble-shooting I tracked it down to the way POST requests were formed by Spackle.
Originally each client would send a request to the server with the POST made up of a complete URL in the POST part, ie.
In client.sh, change the following:
echo -n “$server&action=update&data=” > content
echo -n “action=update&data=” > content
Spackle hasn’t working for months because of that. Must contact the author again.