I just heard this today BC. It's so scary! Not the parents or companies faults in general. I think it has to do with some parents unsure of how to use measurements for giving the medication. I always under dose as I am petrified that I would harm my boy. I'm not sure what to do so I call my doctor. It's a lot to do with the weight rather than the age of the child. I'm glad they're being responsible pulling them off the shelves and hopefully have an easier system for parents to use.
http://www.dailynews.com/news/ci_7152370
This is so scary!