Airport Extreme/Express WPA Troubles

Hey all. I'm finally upgrading to WPA/WPA2 Personal "standards". I have one slight glitch though...
The Airport Expresses won't connect to the Extreme with the proper WPA password. Here's a clip of the logfile with the last 4 of the MAC visible.
Ideas?
Oct 16 14:52:23 Severity:5 Associated with station 00:00:00:00:12:8d
Oct 16 14:52:23 Severity:1 WPA handshake failed with STA 00:00:00:00:12:8d likely due to bad password from client
Oct 16 14:52:23 Severity:5 Disassociated with station 00:00:00:00:12:8d
Oct 16 14:52:23 Severity:5 Deauthenticating with station 00:00:00:00:12:8d (reserved 2).
Oct 16 14:52:26 Severity:5 Associated with station 00:00:00:00:12:8d
Oct 16 14:52:26 Severity:1 WPA handshake failed with STA 00:00:00:00:12:8d likely due to bad password from client
Oct 16 14:52:26 Severity:5 Disassociated with station 00:00:00:00:12:8d
Oct 16 14:52:26 Severity:5 Deauthenticating with station 00:00:00:00:12:8d (reserved 2).
Regards,
-Frank C.

The error messages indicate that you have an incorrect password issue or the old passwords have become corrupted.
Open Applications > Utilities > KeyChain Access and delete the passwords associated with the AirPort Express devices. Then setup the connections one at a time with each AirPort Express and enter new password information.

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