Much of this has been over my head since I don't understand
lockfiles very well. But, here's what's happening to me:
The only recipe I use that has {} looks like this:
 :0
 * ^TOHIGHLA-L
 {
  :0:
  * ^FROM.*(Debbie D|Wendy M)
  01-Highlander
 
  :0:
  /dev/null
 }
It seems to do what I want it to, except for the fact that I'm
ending up with a mail folder with filename "{ " (the space is a
ctrl-I or a ctrl-H, as far as I can tell).
I'm also using spamboucer, but this recipe is processed first.
Any ideas?
--Michael Andersson
        <anderss(_at_)u(_dot_)washington(_dot_)edu>