In case you missed it in the news yesterday, Similac has recalled some lots of its powdered formulas, including Similac products as well as Isomil, Go and Grow, and others. The company has a website (which was overwhelmed yesterday) and a phone number to call. More information can me found at the FDA website as well as the special pages set up at the Similac website, which seem to be working this morning. You can look up your lot number there. There is also a list at the FDA website, but it is very long.
The recall seems to be a precaution; there might be some beetle parts in the formula (by the way, there are normal levels of beetle parts in our flour and sugar and other foods, click on link at your own risk). These are likely to be harmless, but according to the company they could cause some stomach discomfort.