So, I’m writing away (don’t ask why I’m using Word, just don’t…) and I hit “Enter” (you know, to go down a line):

Interesting. I do as it says:

Yep, OK, I follow the instructions, choose to save:

Brilliant! I get the same error again when I try to exit, and all I can do is kill the processes. Gotta love it. Oh, I’m sorry, did I say love? I meant hate.