Movie Mistakes

I read about the movie mistakes that they made in Anchorman and Step Brothers, and it is pretty ironic how often these things really happen, and it is even more odd that people realize all of these things! In the movies that I saw, there was about 30 or 40 minor mistakes, but I saw that the Pirates of the Carribean movie had over 300 mistakes! That is crazy how that many errors can go unseen by many people, and that some people can realize them, and then after that, you always see them. It almost seems like you are looking for them once you find out about them!