GRUB menu is always displayed - Ubuntu 12.10 with full disk encryption

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http://askubuntu.com – I have Ubuntu 12.10 installed with full disk encryption (fresh install), the issue is that the GRUB menu is always displayed, I am not able to set the timeout to 0 and default it to Ubuntu. I only have one OS installed, there is no need for the GRUB menu, also there is no timer on the menu, i.e its displayed forever until I select Ubuntu. I tried updating the GRUB config /etc/default/grub to set the timeout to 0, but nothing works :( GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=0 (HowTos)