I find this happens every once in a while after saving a file via ftp, in every instance it happens during an application crash. I only use ftp for my connections though. It will randomly replace a line (usually on a line that is visible on the current editor window view) with a random offering of extended ASCII characters typically starting within the first 5 columns.
Usually you don't find out about it until a script fails or a web page starts showing the strange characters. I have had 3 crashes today after updating to 5.0.6 and in 1 instance ended up with the strange characters being present in the file. Typically I may see 2 crashes a month. Can you tell us what information you need to track this down. Is there a debug logger we can access somewhere or a specific detail from the windows event viewer? Here is the detail I found from my Application log but it doesn't seem very useful: Faulting application name: PSPad.exe, version: 188.8.131.529, time stamp: 0x606e98be Faulting module name: PSPad.exe, version: 184.108.40.2069, time stamp: 0x606e98be Exception code: 0xc0000005 Fault offset: 0x0000000000a91c60 Faulting process id: 0x45c Faulting application start time: 0x01d742bb1e90eee8 Faulting application path: C:\Program Files\PSPad editor\PSPad.exe Faulting module path: C:\Program Files\PSPad editor\PSPad.exe Report Id: 659df0e6-5030-4e75-a4a4-3a2da4488c52 Faulting package full name: Faulting package-relative application ID: - <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> - <System> <Provider Name="Application Error" /> <EventID Qualifiers="0">1000</EventID> <Version>0</Version> <Level>2</Level> <Task>100</Task> <Opcode>0</Opcode> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2021-05-06T21:52:39.9241518Z" /> <EventRecordID>120280</EventRecordID> <Correlation /> <Execution ProcessID="0" ThreadID="0" /> <Channel>Application</Channel> <Computer>L-20-MIS3.westman.int</Computer> <Security /> </System> - <EventData> <Data>PSPad.exe</Data> <Data>220.127.116.119</Data> <Data>606e98be</Data> <Data>PSPad.exe</Data> <Data>18.104.22.1689</Data> <Data>606e98be</Data> <Data>c0000005</Data> <Data>0000000000a91c60</Data> <Data>45c</Data> <Data>01d742bb1e90eee8</Data> <Data>C:\Program Files\PSPad editor\PSPad.exe</Data> <Data>C:\Program Files\PSPad editor\PSPad.exe</Data> <Data>659df0e6-5030-4e75-a4a4-3a2da4488c52</Data> <Data /> <Data /> </EventData> </Event> -- <https://forum.pspad.com/read.php?4,75192,75632> PSPad freeware editor https://www.pspad.com