--- navi2ch-1.7.5/navi2ch-net.el.emacs22	2005-09-20 02:47:30.000000000 +0900
+++ navi2ch-1.7.5/navi2ch-net.el	2005-09-20 02:47:56.000000000 +0900
@@ -281,7 +281,7 @@
 	     (while (re-search-forward "^\\([^\r\n:]+\\): \\(.+\\)\r\n" end t)
 	       (setq list (cons (cons (match-string 1) (match-string 2))
 				list)))
-	     (let ((date (assoc-ignore-case "Date" list)))
+	     (let ((date (assoc-string "Date" list t)))
 	       (when (and date (stringp (cdr date)))
 		 (setq navi2ch-net-last-date (cdr date))))
 	     (setq navi2ch-net-header (nreverse list))))))))
--- navi2ch-1.7.5/navi2ch-util.el.emacs22	2005-09-20 02:47:40.000000000 +0900
+++ navi2ch-1.7.5/navi2ch-util.el	2005-09-20 02:48:12.000000000 +0900
@@ -369,7 +369,7 @@
 (defsubst navi2ch-replace-html-tag-to-string (str)
   (let ((ret
 	 (or (cdr (if case-fold-search
-		      (assoc-ignore-case str navi2ch-replace-html-tag-alist)
+		      (assoc-string str navi2ch-replace-html-tag-alist t)
 		    (assoc str navi2ch-replace-html-tag-alist)))
 	     (save-match-data
 	       (let ((alist navi2ch-replace-html-tag-regexp-alist)