trouble with cleanfeed.conf

[Bill Tangren]

I am having trouble with cleanfeed.conf. I have a small internal news 
server (no external feeds). On that server, I have disallowed binaries 
using this block in cleanfeed.conf:

    bin_allowed => '^\w+\.binae?r|^alt\.sex\.pictures|^fur\.artwork'.
      '|^alt\.anonymous\.messages$|^de\.alt\.dateien|^rec\.games\.bolo$'.
      '|^comp\.security\.pgp\.test$|^sfnet\.tiedostot'.
      '|^fido\.|^linux\.|^unidata\.'.
      '|^usno',

The last line is what I added to disallow binaries on our news groups 
(all of which start with 'usno'). This worked just fine. The problem is 
that I now want to allow binaries, but removing the last line, and 
putting a comma in place of the period at the end of the previous line, 
does not allow binaries after restarting the server. I then set

block_binaries => 0,

and restarted the server. No joy. I then commented out the bin_allowed 
block above, and put in

bin_allowed => 1,

Still no joy. What am I doing wrong?

Bill Tangren (using inn 2.3.5)