bayes_auto_learn_threshold failed

[Beast]

Any reason why this config failed?
According to Mail::SpamAssassin::Plugin::AutoLearnThreshold it is a 
valid config.

# spamassassin --lint
[11919] warn: config: failed to parse line, skipping: 
bayes_auto_learn_threshold_nonspam 0.1
[11919] warn: config: failed to parse line, skipping: 
bayes_auto_learn_threshold_spam 12.0
[11919] warn: lint: 2 issues detected, please rerun with debug enabled 
for more information
# spamassassin --version
SpamAssassin version 3.1.4
 running on Perl version 5.8.5



--beast