Is Gnome usability usable enough?

It seems, here again, something is missing. At least when I’m not trying to understand, which seems to be what it takes to understand Gnome. I think. I got this nagging pop-up when posting something on Usenet, by means of Pan.
Pan fgreaking error message

I really couldn’t notice any special character on line 1. I’m not sure which character position I had to check, although. Well, luckily I found out the workaround as explained in this error message. Don’t bother explaining me what is means. I’m not interested.