Too much fluoride in water?

According to an article in the Detroit Free Press, the federal government is planning to reduce the level of fluoride in drinking water due to increased cases of teeth spotting. The U.S. Department of Health and Human Services is announcing a proposal to change the recommended fluoride level to .7 mg per liter of water. The standard since 1962 has been between .7 and 1.2 mg/liter.