I haven't yet had to implement any pdf plugins, but I am looking to do so. I am running SA 3.1.9 and perl 5.8.8. From what I can see, my plugins are here:
/usr/lib/perl5/site_perl/5.8.0/Mail/SpamAssassin/ And there is no related folder for 5.8.8 Is that the location where I want to install the plugin? - Skip