Last night I tried to add a note to my existing note file for Joshua 19:40. The result after making the note and quitting Accordance is that the entire note file is now corrupt and cannot be opened.
This happens with either Accordance 12.1.3 or 12.1.4b2
Since I keep regular backups of my note file I have been able to repeat this. I can add a note to other passages but NOT to Joshua 19:40 as anything added there (including just the word "Note" immediately corrupts the file upon quitting.
MacBook Pro (Retina, 15-inch, Mid 2014)
2.8 GHz Intel Core i7
16 GB 1600 MHz DDR3
Running 10.13 Beta (17A360a)