validates :email, :if => proc { |u| u.email_changed? },
:uniqueness => { :case_sensitive => false }
validates :email, :if => proc { |u| u.email_changed? },
validates :email, :if => proc { |u| u.email_changed? },
:uniqueness => { :case_sensitive => false }
validates :email, :if => proc { |u| u.email_changed? },