bayes_auto_learn_threshold_nonspam

[Axb]

for quite a while I've been playing with autolearn settings
SA's default is:
bayes_auto_learn_threshold_nonspam    0.1

this *can* cause low scored spam to be learnt as ham.

For several months I've been using
bayes_auto_learn_threshold_nonspam -1.0

and so far no more false negatives have been learnt as ham which is was 
hoping for.
If you're using autolearn, you may want to play with that threshold..

Axb