mysqldump.c:

  in 4.1: Dump only VARBINARY() in hex,
  while VARCHAR() COLLATE xxx_bin as a string.

client/mysqldump.c

@@ -1527,6 +1527,7 @@ static void dumpTable(uint numFields, char *table)
 	*/
         is_blob= (opt_hex_blob && field->charsetnr == 63 &&
                   (field->type == FIELD_TYPE_STRING ||
+                   field->type == FIELD_TYPE_VAR_STRING ||
                    field->type == FIELD_TYPE_BLOB ||
                    field->type == FIELD_TYPE_LONG_BLOB ||
                    field->type == FIELD_TYPE_MEDIUM_BLOB ||