I've downloaded Kubuntu 6.10. The installer in this version have told me what the problem is. I've tried to add user with the name 'shadow'. Unfortunatelly there is a system group named like that. So I had to choose another name and then the installation has been completed successfuly.
Although I have chosen Polish language during installation, the system has been installed in English. But it's another story.
I've downloaded Kubuntu 6.10. The installer in this version have told me what the problem is. I've tried to add user with the name 'shadow'. Unfortunatelly there is a system group named like that. So I had to choose another name and then the installation has been completed successfuly.
Although I have chosen Polish language during installation, the system has been installed in English. But it's another story.