Everyone has been asking questions about HM Revenue & Customs' entertaining little faux pas, and how it could have happened. Especially as it all seems to be officially dumped on one of the younger members of staff, who are probably a lot more with the technology thang than the Sir Humphreys above them.
There may be a clue in the exchange of emails and correspondence shown here.
The damning evidence is on pages 6 and 7. Hidden among all the censor's black ink, you will notice that someone at HMRC uses Comic Sans MS as their font of choice.
I think we have our culprit, and if we don't, we should.