The X client : fedora 6 : 192.168.1.100
The X server : ubuntu 7.10 --> 192.168.1.200
*xhost +192.168.1.100
ssh -X username@192.168.1.100
export DISPLAY=192.168.1.200:0.0
gimp &
then the X will be shown in local (192.168.1.200)
But the Fedora need to change the setting of gdmsetup
gdmsetup
find [Remote] -> [Style]
