Myself and a few other users have made some changes to our Privacy settings. Do not change anything in there, because if you do, your Feed will stop working permanently, and this is all you get in your profile home:

"User name hasn't really done anything on the site yet :("

See? Even if you change everything back to the original settings, your feed will not work. I'm sure this will be fixed shortly, due to the larger and larger number of users that inevitably will come across this problem in due time. It is quite a big problem too, because the my feed "tracker" is excellent and you feel a bit handicapped when it's gone.