I just tested the File Sharing functionality of Serv-U 15.1.2.189 and found something odd.
The expiration date in the subject line of the email that gets sent to the sender, is gibberish. See example below:
...
Serv-U File Sharing Link [expires ‎9‎/‎27‎/‎2015 ‎12‎:‎00‎:‎00‎ ‎AM]
...
The email that gets sent to the other party is fine. This happens only to the email that is sent to the person creating the share when they tick the Send me an email copy with the upload link check box.