--- gnus-art.el	2002/09/23 20:38:23	6.239
+++ gnus-art.el	2002/09/24 10:22:47
@@ -2281,10 +2281,11 @@
 			      (article-narrow-to-head)
 			      (caar (mail-header-parse-addresses
 				     (mail-fetch-field "from"))))))
-		  (catch 'found
-		    (dolist (pair gnus-article-address-banner-alist)
-		      (when (string-match (car pair) from)
-			(throw 'found (cdr pair))))))))
+		  (when from
+		    (catch 'found
+		      (dolist (pair gnus-article-address-banner-alist)
+			(when (string-match (car pair) from)
+			  (throw 'found (cdr pair)))))))))
 	(when banner
 	  (article-goto-body)
 	  (cond