Puppet users - Aug 2013 - Info: Duplicate generated resource; skipping

In RHEL6, and puppet-3.2 I am seeing a problem with Tidy. Has anyone else 
seen this ? Any solution ?

@tidy { ''/etc/cron.d''
    matches => "somecron",
}

  In another manifests, change the "matches" parameter and realize it,

   Tidy["/etc/cron.d"]{
       matches => [ "someothercron", "anothercron",],
   }
  realize(Tidy["/etc/cron.d"])


Running puppet agent shows the following:

Notice: /Stage[main]/module/Tidy[/etc/cron.d]: Tidying 
File[/etc/cron.d/anothercron]
Info: /File[/etc/cron.d/anothercron]: Duplicate generated resource; skipping


What''s the problem ? I haven''t seen this in earlier puppet
versions. s this
a bug ? 

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