Hi all!
I installed a triple boot configuration (W7, ubuntu 12.10, OSX mountain lion, shared partition) and as many people in here I hate the double selection booting caused by rEFIt! + GRUB. As far as I read grub2 (which was installed by deafult in the MBR by ubuntu) should be able to be the only boot loader even without chameleon.
how can I do it?

as I could understand you can "bless" rEFIt to disable it. can I "un-bless" it if I need it in future?

I read as many tutorials/guide as I can, but even if grub-install detect OSX and show it in the boot list, trying to select it cause a verbose launch of mountain lion that hang in a certain point.

thank you!