So today sees the first upstream release containing initial support for RandR in XQuartz. Version 1.9.0.901 (1.9.1 rc1) contains Jan's patches as well as my followups which have been revised a bit over the past couple months. I don't have a new XQuartz beta for you to try (I still have some more changes I want to make first), but those curious about the current state can try the xorg-server-devel port on MacPorts. I fixed the issue that was reported on Leopard single-monitor configurations, and the "RandR mode" for the native resolution should now appear before the "legacy fullscreen mode" one which should help applications that just pick the first match find the expected mode. I still need to add code to capture the display to avoid window resizing, and multi-monitor configurations aren't supported very well at present. Jan, have you been able to make any headway on the multi-monitor issue? --Jeremy