I just ran into this on a new EFI BIOS machine. It's not supported so maybe in a few months?
While I understand how urgent this reply is to you, I'm having to guess it's the same issue I encountered last month.
I have a problem in installing ubuntu 12.0 along with windows 7.
Whenever I install ubuntu with windows 7, it shows various option when i choose a option that is install ubuntu along with windows 7, it stops booting and the disk will come out of the tray....
What should I do ????
Please reply immediately..