It makes Japanese message catalog display correctly.
--- src/main.c.ORG	2012-03-09 20:28:02.000000000 +0900
+++ src/main.c	2012-03-09 20:27:11.000000000 +0900
@@ -1033,6 +1033,7 @@
 	/* setup locale, i18n */
 	gtk_set_locale();
 	bindtextdomain (PACKAGE, LOCALEDIR);
+	bind_textdomain_codeset(PACKAGE, "UTF-8");
 	textdomain (PACKAGE);
 
 	init_vars();

These message catalogs are evaluated twice.
and "" is special catalog not for use.
--- src/playlist-window.c.ORG	2012-03-10 21:28:49.000000000 +0900
+++ src/playlist-window.c	2012-03-10 21:27:12.000000000 +0900
@@ -102,16 +102,16 @@
 };
 
 static const gchar *playlist_view_titles[COLUMN_ELEMENT_COUNT] = {
-	"",
-	N_("Title"),
-	N_("Album"),
-	N_("Artist"),
-	N_("Year"),
-	N_("Time"),
-	N_("Genre"),
-	N_("Filename"),
-	N_("Comment"),
-	N_("Track")
+	" ",
+	"Title",
+	"Album",
+	"Artist",
+	"Year",
+	"Time",
+	"Genre",
+	"Filename",
+	"Comment",
+	"Track"
 };