Recently, my server's Privoxy rules to block Facebook's spying have failed. How can I block current Facebook spying links?

Since soon after [the inception of Facebook's so-called “Open Graph” cross-site tracking widgets][1] (those “Like” bugs on numerous websites), I blocked them by using this rule (in user.action) on our site's Privoxy server:

{ +block-as-image{People-tracking button.} }
.facebook.com/(plugins|widgets)/(like|fan).*

That worked fine; the spying bugs no longer appeared on any web page.

Today I noticed that they're all making it past that filter [edit: no, they're not].

SOLUTION: The proxy was being silently ignored, though this was not obvious in the client. The above rule continues to work fine.