validates :display_name, :presence => true, :allow_nil => true, :length => 3..255,
:exclusion => %w[new terms save confirm confirm-email go_public reset-password forgot-password suspended]
validates :display_name, :if => proc { |u| u.display_name_changed? },
:uniqueness => { :case_sensitive => false }
validates :display_name, :if => proc { |u| u.display_name_changed? },
validates :display_name, :presence => true, :allow_nil => true, :length => 3..255,
:exclusion => %w[new terms save confirm confirm-email go_public reset-password forgot-password suspended]
validates :display_name, :if => proc { |u| u.display_name_changed? },
:uniqueness => { :case_sensitive => false }
validates :display_name, :if => proc { |u| u.display_name_changed? },