I've got Sabayon_Linux_13.08_x86_Xfce, and unable to login onto live session.I've tried and didn't work:
username/password: adminuser/adminuser Root Password: adminuser Passwords on Live-CD/DVD: The root password: no password is required: just press the Enter key. The sabayonuser password: no password is required: just press the Enter key. For older releases (version 6 and earlier) the password for Root is "root" (without the quotes), and the password for Sabayonuser is "sabayonuser" (without the quotes).
The sabayonuser user doesn't have a password set. You are not supposed to see the login manager during live boot, if you see it, something has gone really bad with X.Org (most likely due to a SIGSEGV or SIGABRT) and it got respawned by the login manager.