Safe mode provides a way to disabling most customisations in TiddlyWiki. This is useful because if TiddlyWiki is customised incorrectly it can be rendered inoperable. A particular issue is that some customisations break when upgrading to a newer core version of TiddlyWiki (especially during the beta).
Safe mode is enabled in the browser by starting TiddlyWiki with the URL hash set to the string
#:safe. For example:
Safe mode triggers two changes:
SAFE:, thus restoring the underlying shadow tiddler
A report tiddler is displayed that allows you to inspect the tiddlers that were renamed.