The first time I run sa-update after a v3.2.3 install, I get the
following warnings:

rules: score undef for rule 'MISSING_SUBJECT' in '' 'MISSING_SUBJECT' at
/usr/local/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm
line 2140.
rules: score undef for rule 'EMPTY_MESSAGE' in '' 'EMPTY_MESSAGE' at
/usr/local/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm
line 2140.
rules: score undef for rule 'NO_RECEIVED' in '' 'NO_RECEIVED' at
/usr/local/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm
line 2140.
rules: score undef for rule 'MISSING_SUBJECT' in '' 'MISSING_SUBJECT' at
/usr/local/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm
line 2140.
rules: score undef for rule 'EMPTY_MESSAGE' in '' 'EMPTY_MESSAGE' at
/usr/local/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm
line 2140.
rules: score undef for rule 'NO_RECEIVED' in '' 'NO_RECEIVED' at
/usr/local/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/PerMsgStatus.pm
line 2140.
....
(repeated several times)

The update succeeds anyway. What causes these warnings?

Thanks, Larry