D Bugzilla is running 3.4.1, which has been released on August 2009. The 3.4.x branch is soon going to be declared End Of Life with the coming release of Bugzilla 4.2.
To benefit from new features and to get security fixes, you should upgrade to 4.0.2 or 4.0.3 (to be released this week or next week).
Comment #1 by LpSolit — 2012-06-10T06:52:04Z
Bugzilla 4.2.1 has been released meanwhile, meaning that 3.4.x is no longer supported and is affected by some unpatched security bugs.