Re: Noting error messages....Let's be fair here...
"So when I get an emailed screenshot, it's from someone who ought to know better."
Nobody's perfect. I had an e-mail from a very sensible IT person, who had, for some unfathomable reasons, decided to wrap the screenshot inside the .docx file. Oh dear. It took a lot of willpower to overcome the urge for vengeance - like sending a handwritten reply in .djvu format.