I was getting the error in the title when trying to create a custom partitioning layout in Fedora 16. Apparently it needs this partition to boot off GPT labelled disks.
What you need to do is simply create a 1 MB "BIOS Boot" partition at the beginning then continue with your desired layout. br>
I hope Anaconda people will be able to make this error message more meaningful as all this GPT stuff is rather new for a lot of users. br>
ToolsShow the IP address
Random password generator
ProjectsRepos - My RPM repositories for CentOS/(RH)EL
Linux LiveCDs - My CentOS based remixes
OpenVM.EU - Linux templates & appliances for Cloudstack