--- emms-tag-editor.el.orig	2007-05-03 10:21:28.347568000 +0900
+++ emms-tag-editor.el	2007-05-03 11:24:36.274339200 +0900
@@ -144,7 +144,7 @@
   "Change tag in FILE use PROGRAM. The TAGS is given in `emms-tag-editor-tagfile-functions'."
   (let (args val)
     (mapc (lambda (tag)
-            (when (> (length (setq val (emms-track-get track (car tag)))) 0)
+            (when (setq val (emms-track-get track (car tag)))
               (setq args (append (list (concat "-" (cdr tag)) val) args))))
           tags)
     (apply 'call-process program