Bayes databases not updated and autolearn field missing from SpamCheck header

[My BSD]

Used Julian's excellent script to install MS v. 4.33.3 with SA v. 3.0.0-RC2.

Everything works except that the Bayes databases are not updated and the
"autolearn=" field never appears in the
"X-%org-name%-MailScanner-SpamCheck:" header (unless the "use_bayes"
parameter is set to "0".

However, if a message is processed manually (spamassassin -p
/opt/MailScanner/etc/spam.assassin.prefs.conf < [message] >
[processed.message]) the databases are updated and the field appears (if
it should).

The relevant Bayes configuration entries are:
use_bayes                            1
bayes_path                           /var/spool/spamassassin/bayes
bayes_file_mode                      0600
auto_whitelist_path                  /var/spool/spamassassin/auto-whitelist
auto_whitelist_file_mode             0600
bayes_auto_learn                     1
bayes_auto_learn_threshold_nonspam   0.1
bayes_auto_learn_threshold_spam      10

Somehow, I believe that it has something to do with the SA.pm module and
SA 3.

--
My

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