We released Bugzilla 4.0 a few minutes ago! It has many new features and improvements compared to Bugzilla 3.x, and comes almost 4 years after Bugzilla 3.0 (which was released in May 2007). With this major release, Bugzilla 3.2.x reached End Of Life (EOL) and is now unsupported. Everybody running a version older than 3.4.10 should upgrade to 4.0 to get future security and stability fixes.
Bugzilla 4.0 got full testing from the QA team, and should be considered stable:
All tests successful.
Files=55, Tests=11621, 2473 wallclock secs ( 1.86 usr 0.23 sys + 21.95 cusr 1.66 csys = 25.70 CPU)
Bugzilla 4.0 (2.9M)