Mailscanner logging to syslog, only partial to mail.log, driving me nuts

[Greg Deputy]

I've had a logging issue going on for a while with MailScanner.  In my
/var/log/mail.log file I'm only getting postfix messages, where all the
MailScanner messages seem to be going into /var/log/syslog.  I've checked
the mailscanner config, and the syslog facility set is 'mail' and syslog
seems to be setup and config'd correctly.  I used to get all logging in
mail.log as expected, but at some point is stopped.  

Any suggestions on what to look at besides what I've mentioned above?  This
is on a debian etch system running postfix, pretty vanilla setup.  

Thanks