This is just one of the many reasons I would be too scared to use an intrauterine device for birth control. I have a few friends who love their IUDs, and then I have a few other friends who have had horrible experiences!
I actually have a friend who had an IUD for a few years with no problems. Then she started experiences serious uterine pain. When she went to the doctor, she found out that she didn't have an infection (which can happen with IUDs, as the article said) but the IUD had lodged itself in her cervix! Scary!