As the author of that node I can confirm that it was created in the usual manner of a reply but also on creation didn't appear in the thread and then when I revisited the new node all the content was missing too. I had to pop back to the preview page to get the content and then paste it back into the edited node (I did not resubmit the preview).

It would be nice to have it reparented to Re^12: How to disable taint checking by Perl? where it was intended to be.