A mistake by Sallie Mae recently messed with the credit scores of thousands of borrowers who signed up for the graduated loan payment program. With a Sallie Mae loan you can defer payments often for a couple of years. There was a glitch that starting reporting these people late. Sallie Mae is reporting that this had only impacted 10% of its borrowers. I'm glad I'm not part of that only 10%. The only 10% people aren't too happy I'm sure. A late payment like this can knock someone out of their ability to obtain top tier credit rates. If it were me I would be pissed.