Confirming the bug on Natty when trying to change layout from default pc105 to "MacBook/MacBook Pro (Intl.)":
$ xprop -root | grep XKB _XKB_RULES_NAMES_BACKUP(STRING) = "evdev", "pc105", "de", "mac_nodeadkeys", "" _XKB_RULES_NAMES(STRING) = "evdev", "pc105", "de", "mac_nodeadkeys", ""
$ gconftool-2 -R /desktop/gnome/peripherals/keyboard/kbd model = macbook79 layouts = [] options = []
Note: Layout "Apple Laptop" works.
Confirming the bug on Natty when trying to change layout from default pc105 to "MacBook/MacBook Pro (Intl.)":
$ xprop -root | grep XKB NAMES_BACKUP( STRING) = "evdev", "pc105", "de", "mac_nodeadkeys", "" NAMES(STRING) = "evdev", "pc105", "de", "mac_nodeadkeys", ""
_XKB_RULES_
_XKB_RULES_
$ gconftool-2 -R /desktop/ gnome/periphera ls/keyboard/ kbd
model = macbook79
layouts = []
options = []
Note: Layout "Apple Laptop" works.