Depending on which study you choose to believe, anywhere from 10 to 80 percent of credit reports have errors in them that can negatively impact a person's credit score. (badcredit.org)
The majority of consumers have errors on their credit reports that may be damaging their credit scores. (lauradadams.com)
As others have pointed out, contrary to what I said, this graph does have error bars. (wattsupwiththat.com)