I get this error in Firefox when I (try to) implement password encryption as per Agile Web Development. I put "require ''digest/sha2''" at the top of my user controller as it suggests, but when I try to edit then save a user record, I get the message in the subject of this post. The Ruby language installation has the ../digest/sha2 subdirectory, so am I supposed to tell rails where it is, or do something else to make it available? Thanks in advance for any help. --Fred -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.