I also tested with fresh install, syslinux in MBR was ok. Has the guy added correct sda* to the APPEND line in syslinux.cfg?
I think that a potential obarun user should have a choice for multiboot. This user has already some system installed, so most likely it should be kept on a drive as well. I've already touched the issue in my post
GRUB install before System install. And I tested it only for MBR. Maybe, someone is ready to test it for UEFI, GPT? Then we may add an article to the wiki.