How bizarre! I’‘m not sure why your cacert wouldn’‘t work if you went with the instructions I posted in … i assume … the thread you are referring to. =/ It almost sounds like an invalid certificate in general. =/ I can try to help you if you want to post the step by step instructions you went through and I’'ll see if I can figure out what happened.
Beyond that, it could be nice if the cacert.org CAs were included with the wildfire dist or something along those lines.
Just to make sure, are you certain that the -client- end also has the cacert.org ca trusted? Psi, for example, required me to install the certificate in a specific location before it was happen with my setup (in it’‘s case, it wanted me to install it in openssl’‘s certs location). In my case, I’‘m on a Mac, and some clients required it to be in my OS X keychain. I ran into a series of "oh crap, why isn’‘t this working?" when I wrote out those instructions until it dawned on me that my client didn’'t know about cacert.org either. =)