This is the best one so far. Combine that with the 'if you refresh this page the text will disappear' from another poster and I think we have a very workable er

This is the best one so far. Combine that with the 'if you refresh this page the text will disappear' from another poster and I think we have a very workable error message that outlines the issue, solution, and due caution necessary, for the potentially non-technical user.