I observe that the menu access keys are correctly disabled if UBUNTU_MENUPROXY=0 is set in the environment, disabling the global menu to revert to menu bar drawn within the gnome-terminal window.
Therefore, I've marked the bug as also affecting unity, as it seems highly likely that at least some of the fix will need to be in Unity rather than gnome-terminal.
I observe that the menu access keys are correctly disabled if UBUNTU_MENUPROXY=0 is set in the environment, disabling the global menu to revert to menu bar drawn within the gnome-terminal window.
Therefore, I've marked the bug as also affecting unity, as it seems highly likely that at least some of the fix will need to be in Unity rather than gnome-terminal.