crashes

My x-server's been crashing with no little regularity when I allow my computer to go idle for very long at all. Basically, if I'm away long enough for the monitor to turn itself off, the odds are I'm also going to have to restart the x-server. My Opera configuration is always saved, thank goodness, but it tends to make me forget whatever I was just doing. And I always lose my chat windows. I'm going to have to see what I can do about that soon, I guess. I'd thought it was fixed the last time I updated and adjusted moblock, but it's not.