So I used "Replace all" in the find dialog. I then could not decide whether to use the old or the new name, so I used the find dialog a couple of times with both names. After three times the exception occured in the Console
Kieth, in case this helps, I recall something very similar happening in an earlier iteration of Scriv. Perhaps 1.03?
PS I love the new version and haven't encountered anything yet, though I've done little but import an older draft into it.