Yep.  They got me with that one, too.  It's a not-very-well-documented
change in the 4.2 client.

The client now excludes those automatically.  So you get "duplicate entry",
if it's in your dsm.opt excludes even  ONCE.

You can see it if you start the command line version of the client and do "q
inclexcl".  The Q inclexcl now shows you that some of the excludes
(including these) come from "operating system", instead of "server" or
"client".
I think that means they are getting it from the registry.

Anyway, just take the ones that say "operating system" out of your dsm.opt
excludes, and the message will go away, and they get excluded.

Wanda