Redmine

hi, folks

here i found a bug when i click the "Edit this section" icon on the wiki page.
(see attached screenshot please)
i got the "500 Internal Server Error"

seek in the production.log, there are lines relate to the error:

NoMethodError (undefined method `each' for #<String:0xcdc790c>):
  app/controllers/wiki_controller.rb:125:in `edit'

i have Redmine 2.2.3 installed, and redmine_redcarpet_formatter plugin for the Markdown Wiki formatter.