An error was discovered in the processing of the 2008 ACS 1-year data and the 2006-2008 ACS 3-year data. About 0.5 percent of the people that should have been included in the survey in 2008 were omitted in error. These were a small percentage of cases whose data were collected via the mail mode. Data collected via the telephone and personal visit modes are not affected. The housing data and only the first person in the household were included in the processing, but all other household members were erroneously excluded. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products. We do not plan to rerelease any of the existing 2008 ACS 1-year or 2006-2008 ACS 3-year tables on American FactFinder, or the 2008 or 2006-2008 ACS PUMS files.