Its Monday, what can I say!
I was fiddling around trying to get squid working on my 10.1 box at home and somehow (hmm) managed to chown everything in /var to squid.squid, instead of /usr/local/squid/var. I chown'd everything (-R) back to root.root, and have changed /var/spool/mail back to root.mail, is there anything else I might have missed? Maybe I should have stayed in bed..
Thanks.