The User favorites feature (enabled by preference user_favorites and documented) allows users to define favorites, but does not let them view the favorites they have defined.
A controller similar tiki tiki-user_watches.php could be added so that users can actually use the feature.
To help developers solve the bug, we kindly request that you demonstrate your bug on a show2.tiki.org instance. To start, simply select a version and click on "Create show2.tiki.org instance". Once the instance is ready (in a minute or two), as indicated in the status window below, you can then access that instance, login (the initial admin username/password is "admin") and configure the Tiki to demonstrate your bug. Priority will be given to bugs that have been demonstrated on show2.tiki.org.
Unable to connect to show.tikiwiki.org. Please let us know of the problem so that we can do something about it. Thanks.