404. That’s an error.

The requested URL /bookmarks/mark?op=add&bkmk=http%3A%2F%2Fdougakan.net%2Fwp%2F%25e7%25b5%25b5%25e6%259c%25ac%2F&title=%E7%B5%B5%E6%9C%AC%E3%83%BB%E7%94%BB%E9%9B%86%E3%83%BB%E6%9B%B8%E7%B1%8D was not found on this server. That’s all we know.