This was not the bug, according to the map details (http://et.trackbase.net/?mod=mapinfo&midx=1151) the map rating was disabled on this map. We try to keep this list up to date, but some times me miss some. If you see map not being rated (mostly this will be if there isn't anything colorized on it) check it, and post it so we can active the rating.
I've been through the list now and updated a bunch of maps.
My apologise, Paul