They found the most potential problems, 174, in Ohio. Illinois followed with 164 questions, and Vermont had 147. The review found the fewest problems, 39, in New Hampshire.

Study Cites Lapses in the 2000 Census
The Census Bureau released its 2000 population counts without resolving more than 4,800 questions raised by a quality control review, a Congressional investigation has found.

"That the apportionment and redistricting data were released with around 4,800 unresolved data issues of unknown validity, magnitude and impact is cause for concern," the General Accounting Office, the investigative arm of Congress, said in a report released on Friday. "The bureau missed an important opportunity to verify and possibly improve the quality of the data."

Census officials said the Full Count Review was poorly integrated with other census operations because it was a late addition to the 2000 count, the General Accounting Office said. The review was conceived only after the Supreme Court upset the bureau's plan in 1999 to adjust raw population numbers using a statistical method known as sampling.

Questions were raised in every state, the District of Columbia and Puerto Rico.
http://www.nytimes.com/2002/07/28/national/28CENS.html