1 files changed, 8 insertions, 5 deletions

diff --git a/lisp/gnus/gnus-art.el b/lisp/gnus/gnus-art.el
index 4bc1e3fe708..d9a32de5528 100644
--- a/lisp/gnus/gnus-art.el
+++ b/lisp/gnus/gnus-art.el
@@ -1529,9 +1529,11 @@ or not."
       (unless charset 
         (setq charset gnus-newsgroup-charset))
       (when (or force
-                (and type (string-match "quoted-printable" (downcase type))))
+                (and type (let ((case-fold-search t))
+                            (string-match "quoted-printable" type))))
         (article-goto-body)
-        (quoted-printable-decode-region (point) (point-max) charset)))))
+        (quoted-printable-decode-region
+         (point) (point-max) (mm-charset-to-coding-system charset))))))
 
 (defun article-de-base64-unreadable (&optional force)
   "Translate a base64 article.
@@ -1554,13 +1556,14 @@ If FORCE, decode the article whether it is marked as base64 not."
       (unless charset 
         (setq charset gnus-newsgroup-charset))
       (when (or force
-                (and type (string-match "base64" (downcase type))))
+                (and type (let ((case-fold-search t))
+                            (string-match "base64" type))))
         (article-goto-body)
         (save-restriction
           (narrow-to-region (point) (point-max))
           (base64-decode-region (point-min) (point-max))
-          (if (mm-coding-system-p charset)
-              (mm-decode-coding-region (point-min) (point-max) charset)))))))
+          (mm-decode-coding-region
+           (point-min) (point-max) (mm-charset-to-coding-system charset)))))))
 
 (eval-when-compile
   (require 'rfc1843))