When I edit a text file with a double-click, line endings are converted from Unix format (LF) to Windows format (CR+LF), no matter the transfer mode I use in preferences (auto or binary). I checked the downloaded file to be sure it was not because of my text editor (Notepad2).
I post this issue because there's a work around : first download the file, edit it then upload the new version. Line endings will not be converted (in extenso, don't use a double-click).
Version : 4.2.7
OS : Vista Family Premium SP 2
Transfer protocol: FTP, SFTP
GUI interface style: explorer
Remote system: UNIX Type L8, no compression