When you try to enter a Full Server, usualy the Queue appears and you have to wait.
With the new 0.63 Experimental (following Exp.) you cant enter the Server Queue, because the game quit down if you try. The Dayz Window just close, you get back to the normal Desktop and the game stops running.

Doesn´t appear when you try to enter a full Exp. Server with a fresh char. Only appears when you try to enter a full Server when you habe played on the Serverhive for several hours.