I really don't understand what wrong with your device or your installations...
Try also from terminal as ROOT
devel-su
your password, default is: rootme
gconftool -s -t b /desktop/meego/status_area/display_percentage true

Another question, before option 3, did you installed something else from tweak T ? Maybe option 2 (status menu extensions) or 1 (unrestricted sys-ui and toggles) ?