sleep proxy Apple TV 7.0.2 not working

Since my Apple TV automatically upgraded to 7.0.2, the sleep proxy doesn't work.

Before, all my Macs (OSX 10.9,10.8 and 10.7) on my home network were displayed under Shared Devices in the Finder whether awake or Sleeping. Selecting one of the Macs automatically woke up the mac in question.

Same for iTunes Library sharing/home sharing with Apple TV: When selecting 'Computers' on the Apple TV, the Mac(s) with shared Libarries automatically woke up.

And lastly, the Apple Remote Application on iPhone/iPad showed all my home sharing devices, whether awake or not. Again selecting a sleeping device in Apple Remote automatically woke the device.

All this doesn't work anymore after the Apple TV software upgrade.

Digging a bit deeper, a Sleep Proxy is supposed to advertise itself using mDNS _sleep-proxy._udp. I don't see any of that anymore.

Is this yet again a feature silently dropped by Apple?