Xorg fails to start at the end of boot. Solution: Preselect your language at boot menu or from the command line with: slitaz lang= kmap=

Upgrade from 3.0 to 4.0 can be a pain from the Package manager. Solution: Use SliTaz Installer from the command line or TazPanel to perform an upgrade.

Desktop bottom panel is missing. This is a bug from LXpanel. Solutions:

cp /etc/lxpanel/slitaz/panels/bottom \
    $HOME.config/lxpanel/slitaz/panels