(defun rfc1843-decode-article-body ()
"Decode HZ encoded text in the article body."
(if (string-match (concat "\\<\\(" rfc1843-newsgroups-regexp "\\)\\>")
- gnus-newsgroup-name)
+ (or gnus-newsgroup-name ""))
(save-excursion
(save-restriction
(message-narrow-to-head)