I was making great progress on a script this afternoon. Then I tried to save it, and I got this message (ignore the meaningless filename — this screenshot is actually from the third time I tried saving it under different names):

I clicked “OK,” then I got this:

When I tried to re-open another copy of the file, I got this:

ARGH!!!

I perused the tech support docs and did find a (very kludgy) workaround, so I didn’t lose all of my work. But this isn’t the kind of thing that inspires confidence in Final Draft…