Is X11 part of Leopard Installation or do you still need to install it from the original Installation CD? And if already installed is there anything I need to run to get it to run with program like "GIMP"? Thanks!
Also, a little birdie told me that 10.5.2 will have many of the Xquartz 2.1.3 patches in it. So you could just wait for 10.5.2 and see if that's sufficient.