In addition to a number of new changes and updates, this 1.2 Point Release also includes the changes from update 1.0.4.0, beta 1.0.5.0 and beta 1.0.5.2. If you have not previously updated QUAKE 4, this update will bring your installation completely up to date. If you have previously installed an earlier update, this update can be installed over the earlier update(s) without problems - there is no need to re-install previous updates released through the id Software website. Doing so may adversely affect the proper functionality of your installation.