Found out how to fix Brightness Up/Down keys in my account based on Marc's idea:
1. rm -rf .gconf/desktop/gnome/peripherals/keyboard/host-`hostname`
2. Set System->Preferences->Keyboard->Keyboard model = Evdev-managed keyboard
3. edit ~/.Xmodmap and remove keycodes 233/234 (if there are any definitions). These
keycodes in Hardy were sent by Back/Forward keys above Left/Right Arrow keys, but now
these keys have keycodes 166/167 and are already correctly mapped to XF86Back/XF86Forward,
so no need to remap them in .Xmodmap.
4. Restart X.
Found out how to fix Brightness Up/Down keys in my account based on Marc's idea: desktop/ gnome/periphera ls/keyboard/ host-`hostname` >Preferences- >Keyboard- >Keyboard model = Evdev-managed keyboard XF86Forward,
1. rm -rf .gconf/
2. Set System-
3. edit ~/.Xmodmap and remove keycodes 233/234 (if there are any definitions). These
keycodes in Hardy were sent by Back/Forward keys above Left/Right Arrow keys, but now
these keys have keycodes 166/167 and are already correctly mapped to XF86Back/
so no need to remap them in .Xmodmap.
4. Restart X.