You might have noticed there aren't any adverts on UKMIX at the moment. It seems Google have suspended them citing "copyright violations" and provided a link to a topic from 2005!
While I'm waiting for Google to respond I'll be looking for another ad network, so I expect ads will be back soon.
I also wrote this post on Google+
about the subject. If you have a G+ account feel free to comment or re-share it.