Ok - I am on a MacBookPro Retina connected to the Ethernet by Thunderbolt (from display). So this might leave the problem to the WiFi connection!

Be aware: the behavior is depending as wheather you use - WiFiand / or - power supply plugged in. I have no problem using eathernet cable plugged in and the power supply attached (using 3.1.04072). I guess it has something to do with the new introdu...