[Cooker] getting error that ftw user doesn't exist

[Thomas Spuhler]

Here is the end of the kdm.log:
(**) RADEON(0): Initializing Xv
(**) RADEON(0): RADEONScreenInit finished
(EE) AIGLX: Screen 0 is not DRI capable
Synaptics DeviceInit called
SynapticsCtrl called.
Synaptics DeviceOn called
(**) RADEON(0): RADEONSaveScreen(2)
cp: cannot create regular file `/home/ftw/.Xauthority': No such file or
directory
chown: `ftw': invalid user
su: user ftw does not exist
userdel: user ftw does not exist
QImage::convertDepth: Image is a null image
QImage::smoothScale: Image is a null image

I don't know why I need an ftw user?