Notepad glitch

Notepad has a strange glitch with some combinations of words. It happens when you open notepad, type in certain phrases, save the file, close and open the file, and the document is magically changed. This got popular with a certain conspiracy theory phrase of "bush hid the facts", making it appear that your operating system is keeping you from your freedom of speech. The funny thing though is that it also changes phrases like "bill fed the goats" and "hhhh hhh hhh hhhhh". It's some sort of Unicode error with 4, 3, 3, and 5 letter words seperated by spaces. The system apparently detects some combinations as unreadable characters.