Comment 36 for bug 7848

Same problem here. Here's the outputs as requested:

 xprop -root | grep XKB
_XKB_RULES_NAMES_BACKUP(STRING) = "xorg", "pc105", "fr", "oss", ""
_XKB_RULES_NAMES(STRING) = "xorg", "pc105", "fr", "oss", ""

 gconftool-2 -R /desktop/gnome/peripherals/keyboard/kbd
 layouts = []
 model = macintosh
 overrideSettings = true
 options = []

And for what it's worth:
uname -r
2.6.24-19-generic