I tested the same config in Precise (12.04) and still the same issue. It looks like that the arp notifications are trying to be sent through br0, we must evaluate if this is the right workflow and also if the current configuration is an acceptable use case given how the code layers have been written in the kernel.
I am sending on the next comment a apport-collect 736226 from the test environment.
@Chris,
I tested the same config in Precise (12.04) and still the same issue. It looks like that the arp notifications are trying to be sent through br0, we must evaluate if this is the right workflow and also if the current configuration is an acceptable use case given how the code layers have been written in the kernel.
I am sending on the next comment a apport-collect 736226 from the test environment.
Leonardo