Created attachment 821288 [details]
Screenshot demonstrating this strangeness (not necessarily a bug).

Tried to install F20 LXDE via live image's "Install to Hard Drive"
and observed as per the attached screenshot.

While this has no effect on the ability to finish the installation,
I was curious if this is something intentional or rather not
(e.g., paranoid user could ask if the extra window when providing
a password is really a legitimate and not just some proxy...).

Note that the first window is effectively inaccesible (clicking
it does nothing, only if both windows background, it will bring
the second one to the foreground.

Also interestingly, Alt+Tab switch will only show a single instance
of anaconda.