User blog comment:Sarah Manley/New Editor Scheduled for Sitewide Release/@comment-13301-20110902192151

According to User:GTAAAF it seems that, because of the preview system on the new editor, it's no longer possible to preview the personal CSS or JS subpages (/wikia.css and /wikia.js) so people should save their edits for testing purposes instead of just do a preview.

And since the cache is extremely bad at updating, waiting for the cache to update for just testing things would be really irritating, both for the user and for the people patrolling recent changes.