This is getting interesting day by day. See this post Tim Worstall: New York Times Corrections Policy on some very embarassing errors made by various NY Times columinists:
2) Calame was most insistent that corrections must be appended to the specific column in which the error occured. Only in this manner will those using (those few) search engines and archives which carry the Times be able to see it. An errors policy which puts it on a later page, or one that puts the corrections box elsewhere in the paper will not do.
Shouldn't Lexis Nexis and DJ Factiva database demand from NY Times that any corrections be appended to the digital versions of the original articles instead of leaving it to the discretion of NY Times? Even search engines, such as google, can also demand the same thing from NY Times and other sources. Or maybe, google can put an extra tab, "Search in Corrections" on their home page.