Just received from PMI:

Important update about PMP exam reports

Dear R.E.P.s:
As you may have heard, PMI recently identified errors in the scoring and reporting of the Project Management Professional (PMP)® credential examinations given between 31 August and 3 October 2011. An error in exam processing occurred because exams were originally scored by an erroneous scoring process so that some candidates’ pass/fail results were calculated incorrectly.
Due to this vendor processing error, some candidates were informed that they had failed, when in fact, they had passed. No PMP candidates were told they passed the exam when they had actually failed. All candidates who have taken the exam since 31 August were notified promptly with an explanation and provided with a link to access their corrected exam reports. The error has been corrected, and anyone taking the PMP exam after 9 October 2011 can be confident that their score report is accurate.
We apologize for any inconvenience or anxiety this error has caused any of our PMP candidates. PMI is committed to operational excellence and as such, we are working to improve our processes to prevent this type of situation from occurring again.
If you need additional information or one of your PMP candidates has contacted you for assistance, please direct them to contact PMI at customercare@pmi.org, where we have specially trained associates who can provide assistance.
Sincerely,

Victor Carter-Bey
Manager, PMI Certification Program