Grammatical Errors in the Qur'an

While pondering over the manner in which the Qur'an came into existence, I came across some articles on the web that give some good insights. This article lists some non-Arabic words that entered into the supposedly 'pure' Arabic revelation, it shows some grammatical mistakes in the Qur'an, and also there is a difference between earlier versions of the Qur'an and our present copy. This is another good article about the same issues. For Muslims who are not used to any form of textual criticism, this is of course haraam to say. What the heck, I prefer truth over lies.