Ruby on Rails

Ever since I upgraded my applications to rails 3.0.19 due to the security issue with older versions, exception notification has stopped working.  What is the fix for this problem?  Thank you.

Rendered /var/www/rails/xxx/shared/bundle/ruby/1.9.1/gems/exception_notification-3.0.0/lib/exception_notifier/views/exception_notifier/exception_notification.text.erb (95.5ms)

ActionView::Template::Error (code converter not found (UTF-8 to UTF-16)):
    19:         [title, summary.gsub(/^/, "  "), nil].join("\n\n")
    20:       end
    21:     end.join
    22:     sections = sections.force_encoding('UTF-8').encode('UTF-16', :invalid => :replace).encode('UTF-8') if sections.respond_to?(:force_encoding)
    23: %>
    24:
    25: <%= raw sections %>

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