When I connected to my 11.04 server using PuTTY (from Windows) with X11 forwarding enabled, if I entered the command echo $DISPLAY I'd see localhost:10.0 and when I started an X program, it would appear on my Windows's X server. After upgrading to 11.10, the DISPLAY variable is no longer being set when I log in, so X forwarding doesn't work. I have checked to ensure that X11 forwarding is still enabled in the SSH server config (it is) and the config files haven't actually changed since before the upgrade. So why did the upgrade stop this feature from working? Oh, I can manually set DISPLAY to point to my Windows machine and X works fine, but it isn't being tunneled through the SSH connection like I'd prefer. Help?