In order for syslinux's gptmbr.bin to work with UEFI systems we need to be able to set the Legacy boot flag on GPT partitions. This is used with livecd-iso-to-disk when creating a bootable USB drive that works on BIOS and UEFI systems.
Created attachment 481094 [details] Add GPT Legacy BIOS Bootable flag to Attribute struct
Created attachment 481095 [details] Add legacy_boot flag support
The attached patches work, but should wait until after Alpha is released to be added.
parted-2.3-9.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/parted-2.3-9.fc15