Recover a file after hitting "replace" in copy dialog? Someone I know copied a file into a directory over another one and hit "replace" accidentally. Is there any way to recover the older version of the file on Mac OS X Leopard 10.5.8?

EDIT:

Time Machine was not running at the time.
If there was no backup, then I'm afraid that file is gone.  That's exactly why you should always be backing up.