When rebooting or suspending, I've noticed this message appears in /var/log/messages.
Not sure what it means, ifconfig -a nor grepping /etc/ showed where the MAC (?) is comming from. I also checked NetworkManager profiles and nothing there either.
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dmidecode output with serial numbers 'X'ed out
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FWIW, that MAC address is probably for your AP. Are you able to continue using your wireless device after seeing this message?
Yup, right you are, MAC of the IP.
And yes to the second question too - since this happens during shutdown/reboot/suspend - I can use the device if the notebook comes up again :-) [I'm fighting some suspend issues, but that's a different bug]
Are you still seeing this issue with currently updated Fedora kernels/
I'm running F14 with latest updates-testing (and I've also switched to a different AP). And grepping /var/log/* shows that the messages are no longer present.