Exactly the same for me. I've done the whole strings changing thing, and it works to a certain extent, but I've never seen it work for the main server list for me or anyone else.
I did experiment with your way EmielRegis, and it does seem to work, so thanks for adding that...never actually realized you could just add new maps...though i am having some difficulty getting the map to show up in the admin panel, so not sure what i missed.