When I edit a file from an SFTP-3 connection, WinSCP uses up 100% available idle CPU when it is idle. Foreground programs run fine, but background programs are starved. Even when I set process priority to Low, it still uses all available CPU.
Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.