When checked, preserve timestamp option sets timestamp on uploaded files to: 01-01-1970 01:00
This is not only a display problem, the timestamp is really set to that time.
Winscp displays: 70-01-01 02:00:01 (one hour later).
tested and confirmed in scp and sftp modes.
WinSCP version: 3.2.1 build 174
Debian, OpenSSH Server v. OpenSSH_3.6.1p2