Hi, guys, due a lot of changes on archlinux, (eg: grub was dropped and grub-2.00 is default bootloader -> http://www.archlinux.org/news/grub-legacy-no-longer-supported/) was created a new iso with support for keyring and the new grub. So, in our case, I keep grub-0.97 package until Parabola new iso creation.
That notice about archlinux new iso is here -> http://www.archlinux.org/news/install-media-20120715-released/
Now, that problem is very critical for us, and we should create a new iso to avoid future problems and conflicts on the installation.