Update August2014
Meanwhile Devolo has submitted a well-functioning night circuit via firmware update. Since then, an extreme bug has crept. This seems not to be taken from devolo really seriously because I have reported him well 8 weeks before. So far, nothing has been done.
If the night service and the MAC address filtering is enabled, the filter is after the first night no longer functional, even though it is switched on. The configuration interface suggests a functional filter !!!. That Forbidden devices can use these AP anyway.
What is even worse; you should run with 2 different channels 2 adapter on the same SSID and encrypt this course, please never pulls one out of the socket. Because if you then take it back into operation, the adapter will send a WLAN without encryption. The configuration page displays an established encryption. Fortunately, my phone has given me an indication of an insecure network. Otherwise, I would provide a free Hotspot for my neighbor.
The solution to both problems> Filter / encryption off and on again.
I have long considered this to post here, but there does not seem to take seriously Devolo the safety of their customers, I have thought about it otherwise.