The newest version of OS X, 10.8 - Mountain Lion is scheduled to be released sometime in July of 2012 by Apple.
Based on past experiences, we do NOT recommend users currently encrypted with PGP Whole Disk Encryption or SEE Full Disk Encryption for Macs upgrade to OS X 10.8 when made available by Apple.
Symantec is actively testing PGP WDE and SEE FDE against the 10.8 developer builds from Apple. We will continue testing against all developer builds from Apple and also against the official release from Apple.
As a reminder, you should not upgrade to 10.8 if you wish to continue to use WDE. If you must upgraded to 10.8, then please decrypt your disk prior to installing 10.8. Once on 10.8, please do not re-encrypt at this point in time.
Please check back to this blog for updates as they become available.
EDIT @ 2:16PM PST