diff -urN vte-0.11.11.orig/src/iso2022.c vte-0.11.11.ambiguous/src/iso2022.c
--- vte-0.11.11.orig/src/iso2022.c	2004-06-22 05:48:30.000000000 +0000
+++ vte-0.11.11.ambiguous/src/iso2022.c	2004-10-09 09:06:30.000000000 +0000
@@ -402,6 +402,13 @@
 		}
 	}
 
+	/*
+	 * Decide the ambiguous width according to the default region if 
+	 * current locale is UTF-8.
+	 */
+	if (strcmp (codeset, "utf8") == 0)
+	  return _vte_iso2022_ambiguous_width_guess ();
+
 	/* Not in the list => not wide. */
 	return 1;
 }
