d8552e4 created the issue

In build 3243, I'm encountering the Overwrite/Resume/Rename dialog box normally encountered when uploading a file that exists on the server, when I try to upload a file that does not actually exist on the server I'm uploading to. In the dialog, the date and size of the (nonexistent) remote file are shown as 'Unknown'.

Upon 'overwriting' the nonexistent file, I then get a failure dialog claiming 'A reference was made to a file which does not exist' - but the file turns out to be successfully uploaded.

This occurs both for FTP and SFTP servers for me.

I wasn't encountering this behavior in earlier builds I'd been using; it seems to have started when I upgraded to 3243.