When you say that you installed the latest version do you mean that you installed 1.7ST? 1.7.1rc1? or 1.7.1ST (released earlier today)?
Went to osticket.com, clicked on green button entitled "DOWNLOAD NOW"
Download file is named osticket-v1.7.1.zip
Download done TODAY!
Either way please review:
http://osticket.com/forums/showthread.php?t=8511(http://osticket.com/forums/showthread.php?t=8511)
and update your thread with information about your setup please.
Mail Sending: phpMail functions or SMTP
Did not get to the point of choosing
Mail Fetching/Receiving: IMAP or POP and Server version
Did not get to the point of choosing
PHP version
PHP Version 5.4.19
Operating System
Linux infong 2.4 #1 SMP Mon Aug 5 20 CEST 2013 i686 GNU/Linux