|Two things that I have observed:
1- I created a user account with the username 'Zheng Yuk Ping'. It seems to be
problematic, because I can't add rights to the user. Moreover, I can't delete it.
2- After creating a user, when I click on 'Edit', and give him a password, then
add one right with the Authentication mechanism 'none', then click on 'update...'.
When I try to login with the password, the system does not recognize. But if
I go there again (edit the user) and insert password, it accepts.