I'm particularly concerned about hackers as there seems to have been an uptick in hacking lately. My sites at Hostmonster were hacked and infected with malware that kept re-appearing through a back door and it took several weeks to fix it, even after I hired Sitelock to fix and protect them
The Announcement section has a thread from 2009: http://www.plogger.org/forum/discussion/2109/important-security-update-for-10b3-users-aka-version-30-beta/#Item_10 So it may be any concerns based on 2005 issues are resolved.