By default journaling is on in 10.3 but was off in 10.2. Here's an explanation of what's happening and whether or not a user should keep the journaling on.
Maintained by members of the Apple Consultants Network for the purpose of raising the awareness and capabilities of all OS X users. Short tutorials and essays with many screenshots.
Tutorials on using Open Source Unix and freeware programs on Mac OS X and Darwin to record and edit audio, convert audio files to different formats, burn CDs, make ISO images, and build webpages.
Tutorial article examines the methods OS X uses to makes files invisible, what and where the major invisible files are, how to change an item's invisibility status, and how knowing all of this can help in troubleshooting.
This site is about scripting with a particular emphasis on OS X. Since much of this works in any Unix interface, it may be of interest to Unix scripters as well.