SAtcomer your reply was just pointless. The day you are in rage, I'll point this out to you, see how it will cool you down or get you further annoyed.
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For those who care the issue is that the new airport utility does not remind users that when setting up a wds network, you have to declare your new airport extreme/express to tha main airport extreme/express.
Previous releases of the airport utility did remind you to do this.
So when you connect a new airport, don't forget to link the main airport and insert the address of the new airport.