From Salon is this article called "The secret Iraq documents my 8-year old found". The U.S. Coalition Provisional Authority, which formerly governed Iraq, accidentally published Microsoft Word documents containing information never meant for the public. This information was discovered by the simple application of the "track changes" tool within Word.
"Presumably, staffers at the CPA's Information Management Unit, which produced the weekly reports, were cutting and pasting large sections of text into the reports and then eliminating all but the few short passages they needed. Much of the material they were cribbing seems to have come from the kind of sensitive, security-related documents that were never meant to be available to the public. In fact, about half of the 20 improperly redacted documents I downloaded, including the March 28 report, contain deleted portions that all seem to come from one single, 1,000-word security memo. The editors kept pulling text from a document titled "Why Are the Attacks Down in Al-Anbar Province -- Several Theories."
Read the source material (with and without changes) here.