OSNews post: MacOS 10.4.6 Released. “The 10.4.6 Update is recommended for all users and includes general operating system fixes, as well as specific fixes for the following applications and technologies: login and authentication in a variety of network environments; file access and byte range locking with AFP file sharing; network access when using proxy server automatic configuration files; searching iWork ’06 and Microsoft Office documents with Spotlight; creating Automator workflows for iPhoto 6; synchronizing contacts and calendars to .Mac and mobile phones; and much more.” There’s a delta update for 10.4.5, and a combo update for 10.4.0-10.4.5. Easiest method is to just use Software Update.”