Fedora 18 Gnome install jams

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http://forums.fedoraforum.org – I was trying to install Fedora-18-x86_64-Live-Desktop.iso on a logical sda11 partition, that was preformatted to ext4, but the install jams before it's ready, with an error report. I have a multiboot environment with some Windowses and grub4dos installed to MBR (my plan was to let the Fedora replace MBR with it's grub MBR, then edit grub4dos config file and install grub4dos back to MBR). Previously some Linux Mints and Suse have installed without any glitches to this setup. The MB is a new Gigabyte Z77X-UD3H, 8 GiB ram, standard 1 TiB hd with 63 cylinder structure used, BIOS is in leg (HowTos)