I've used X11 since the betas and it has worked well for me. Just recently I used a wireless laptop for the first time and noticed that, after sleeping the computer (hence, I assume, losing the network connection), that upon awakening X11 applications failed to run because they could not connect to the display. So I was wondering if this is a bug or feature. My usage was at a conference, hence limited in duration, and my "solution" was to restart X11, but this rapidly became tedious.