According to [1]: > As early as 2001, McDonnell’s team had found “hundreds” of bugs. [...] One, named the “Dalmellington Bug”, [...] would see the screen freez

According to [1]: > As early as 2001, McDonnell’s team had found “hundreds” of bugs. [...] One, named the “Dalmellington Bug”, [...] would see the screen freeze as the user was attempting to confirm receipt of cash. Each time the user pressed “enter” on the frozen screen, it would silently update the record. In Dalmellington, that bug created a £24,000 discrepancy, which the Post Office tried to hold the post office operator responsible for. > Another bug, called the Callendar Square bug [...] created duplicate transactions due to an error in the database underpinning the system: despite being clear duplicates, the post office operator was again held responsible for the errors. At the high level, though, the controversy here is not any single bug. The controversy is multiple bugs, and the failure to properly investigate or fix the bugs, and falsely telling subpostmasters nobody else was reporting bugs, and the software development process that allowed for such bugs, and the private prosecutions, and the people being wrongly jailed and bankrupted, and the justice system giving undue credence to electronic records, and the cover-ups like hiring forensic investigators then calling them off a day before they submitted their reports, and the threats to journalists, and the fact there were reports in computer weekly and private eye for many years, and the fact it's utterly inconceivable that the post office's senor management and legal team didn't know what was going on. So we shouldn't focus on one or two major bugs and ignore the broader failings of post office managers. [1] https://www.theguardian.com/uk-news/2024/jan/09/how-the-post-offices-horizon-system-failed-a-technical-breakdown https://www.theguardian.com/uk-news/2024/jan/09/how-the-post...