It still happens also with the latest build 5.0.7 (675). Today I had about a dozen c and h files open and did nothing else than pasting a line to the copyright header on top of the files and save and close the files. 2 of the files had then a line destroyed with the known invalid characters. So I'm pretty confident that it happens during the save process. I think it is hopeless to find this annoying, very destructive and dangerous bug without an idea where to look and would suggest to recheck the modifications which were added to PSPad in the weeks and months before the bug was reported the first time wich was most probably many years ago.
-- <https://forum.pspad.com/read.php?4,75123,76417> PSPad freeware editor https://www.pspad.com
