Hi,

I tested SL 6.9 x86_64 with netimage
[http://ftp.scientificlinux.org/linux/scientific/6rolling/x86_64/iso/SL-6-x86_64-netinstall.iso]
you gave us.

Installation was on libvirt/qemu/kvm.

Installation process went as follow:

1) Test disc - OK
2) Select default options for network configuration in URL submenu
3) Put url
http://ftp.scientificlinux.org/linux/scientific/6rolling/x86_64/os/
4) Wait for retrieving install.img etc...
5) Wait for graphical installer. Next -> Install anyway (alpha/beta
infobox).
6) Hostname sl69
6) Basic Storage Devices
7) Zone - Warsaw, then set root pass.
8) Use All Space twice, on third try I made manual partitioning.
9) Customize now -> Install all package group except language support,
without adding optional packages in any group.
10) Install
11) There is error - "libguestfs-1.20.11-20.el6.x86_64.rpm cannot be
opened. This is due to a missing file, a corrupt package or corrupt
media. Please verify your installation source."
Screenshot included.

I tried on 3 different installation, (one with only 20 gb of disc space,
so I make it bigger 40 gb, when same package had problem I thought that,
this might be bug, but to be sure I made 50 gb installation with manual
partitioning, same result)

I would love to hear if anyone else can reproduce.

Bests
Alex