[imapfilter-devel] weird behavior of 'delete'

[Daniel M. Drucker]

I have this filter rule:

account dmd dmd%403e.org at localhost:143
  folder inbox INBOX
  folder spambox "Junk E-mail"

filter spam or
  mask subject "***SPAM***"
action move "Junk E-mail"

filter oldspam and
  mask subject "***SPAM***"
  mask older 1
action delete

and these jobs:

job spam inbox
job oldspam spambox

I get approximately 1 spam every five minutes throughout the day (on
average), for a total of around 300 spams per day. Yet this rule acted once
when I first killed and restarted imapfilter, and then never ran again,
until a week later when I killed and restarted imapfilter again - at which
point it happily did what it was supposed to do.

What gives?

I'm running 0.9.4.

Daniel