I currently have TB - W7, OS X, Ubuntu . I have hybrid disk. I first install e format OS X, then W7 and Ubuntu.
I used gptsycn (after install Ubuntu) that repaired windows 7, so, I enabled (in windows 7) the partition of OS X, I left as activation (do this at the prompt), and then reinstalled the chameleon (in OS X) overwriting grub. After I set up grub (in Ubuntu) to not show the boot screen and select your own Linux through the settings in / etc / default / grub .
Sorry my bad english, I hope that everyone understands