February 1st, 2010· Certain uncommon geometry constructs could cause ZDBSP to enter an infinite loop.
· Support for mixing regular Doom format maps and Hexen format maps in a single wad was broken.
March 17th, 2009· Fixes the bug that prevented you from switching weapons after respawning in multiplayer.
· Fixes a performance regression introduced in 2.3.0.
· Adds support for zip/pk3 files with LZMA and BZip2 compression. (7-Zip is one program that can create such files.)
· Addresses a few other niggles.
March 4th, 2009· This release adds lots of new ACS and DECORATE features, plaintext definitions, UDMF support, improved performance, and much more.