[CentOS] CentOS 7.1 user login screen can't scroll up/down

> Can you use the page-down and arrow keys to navigate the list? Which Display
> Manager ( [kxg]dm ) are you using? Try a different one if the keyboard
> navigation does not work.

No, page up/down and arrows don't work either.

Display Manager: Whatever comes with CentOS 7.1 (cannot be changed at 
the login screen).

Johnny Hughes informed us that an upstream bug has been reported:
https://bugzilla.redhat.com/show_bug.cgi?id=1184802

/Ole