yast2 can't add user


I just tried a clean install of openSUSE 12.3 Beta on my new laptop.
Yast was not able to add a new user, so I only have root. Everytime I try to access the “user and group management” module of yast, I get

“Error while creating client module users”

Same with Security Center and Hardening (“… module security”). Every other module works.
What should I try to enlighten the issue?

Edit: Oh, it’s probably RC1, not Beta. I did a network install. But the USB image was still from Beta, so maybe there is some weird version incompatibility?

I’d rather make sure it’s not your Edit remark, before filinig a bug