Since some time last year, genres are not being persisted anymore. When you enter them in, they are lost sometime after e.g. http://www.themoviedb.org/movie/177901-witchcraft-v-dance-with-the-devil/changes

Here you can see I added 'Horror' but now its gone. Would appreciate if this can be looked at as I think its quite critical that data keeps getting lost. People will no longer bother adding them if they don't persist.