Well, when he entered the site using his Microsoft Internet Explorer browser, the page just looked horrible. The reason was that his browser was set to display Japanese characters by default. Many characters could not be displayed so he received the little boxes. Some text popped up, some didn't. It was a mess.
Every page has to be reloaded and encoded.
What's interesting about this problem is that it doesn't have to happen. C'mon, admit it. That line of text will save persons using a browser not set to display English a lot of reloading. The reason is that the us-ascii charset only contains the 128 ascii characters. Look at your keyboard.