The query result of embedded document is inconsistent.

mongoid-bug.rb

require 'mongoid'

class Address
  include Mongoid::Document
  embeds_many :locations
end

class Location
  include Mongoid::Document
  field :name
  embedded_in :address
end

Mongoid.configure.master = Mongo::Connection.new.db('mongoid-bug-2011-03-14')

@address = Address.new(:street => "Clarkenwell Road")
@address.locations << Location.new(:name => 'No.1')
@address.save

#just change the condition order, but the result is difference.
p @address.locations.where(:name.in => ['No.2'], :name.ne => nil     ).first
p @address.locations.where(:name.ne => nil,      :name.in => ['No.2']).first