need help with formail recipe in Procmail

I am trying to remove the X-UIDL header from my mail and this is what
I have in /etc/procmailrc:

:0 fhw
* ! multipart
| formail -k \
   -X X-UIDL:

:0
next rule...


My procmail log (the user one) shows this for *some* messages but not
all:
> From foo(_at_)bar  Mon Jan 15 23:18:35 2001
  Folder: /dev/null                                                  
       95
> From foo(_at_)bar  Mon Jan 15 23:19:02 2001
  Folder: /dev/null                                                  
      124
> From foo(_at_)bar  Mon Jan 15 23:20:06 2001
  Folder: /dev/null      

The foo(_at_)bar is what Procmail actually puts in the log.
What is wrong with this picture?

thanks

--
Andrew
                       



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