spree/spree_email_to_friend — pull request #3 by rosalin (2011-10-16 22:19:19+00:00)
Title: replace code

replace this:
ToFriendMailer.deliver_mail_to_friend(object,@mail_to_friend)

to:
ToFriendMailer.mail_to_friend(object,@mail_to_friend).deliver

worked for me! thanks