I'm paring down the prefs to those that I want to document for first-time users. I'm just taking out the user interface for these prefs, they're still implemented in the engine, so existing websites should be fine. You can also manipuate the values by editing tables in members.root.
The features may come back, after a review, and possible fixes and tweaks.
worldOutlineSuite.data.backup.userPrefsMay2012 contains an archive of the prefs outline before these changes.
Custom 404 page