steering will pull left or right uncontrollably

This has problem has happened on more than one occasion. During a drive the steering will pull the car left or right without warning. It seems to happen when nearing a corner or curve in the road but is not limited to that. After several occurrences my wife is now afraid to drive the car. I am afraid it may cause a serious accident. I saw a recent post on your site from someone else experiencing the same problem. This issue needs to be addressed, people can be seriously hurt or die from this problem. I have not seen any recall from Ford on this problem. If someone else has had this problem and had it repaired I would like to know the solution. I will notify the dealer next but I am not optimistic about the outcome.