There have been some changes in how the "Favourite Stories/Authors/Series" feature works and I've gotten some questions about it to which I didn't even know the answer myself so I thought I might as well let everyone know what sico kitty found out about it.  You now have to deal with 2 screens to make a story or an author your favourite.  When you click on "add story to favourites" or "add author to favourites", it then takes you to another screen with the name of the story or author on it and underneath a box for comments.  It doesn't matter if you decide to put comments in it or leave it blank, but you must then press the "submit" button underneath the comment box for your favourite to be added to your account.  I hope this helps.