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I can't quite figure it out, but I have a view with nodes that do not contain gender.
But the hide feature works on another view I have:
Does not contain Sport Motorcycle Model: http://www.pinkgorillacycles.com/exhausts/slip-cruiser
Does not contain Cruiser Motorcycle Model: http://www.pinkgorillacycles.com/exhausts/slip-sport
It might be related to the fact that if the view contains no node then it defaults to showing each option for the filters:
The manufacture view does not have a content type with the gender cck field.