Not a bug
Every time I visit the site I have to go to the front page in order to access my "all uploaded images" view. Going directly to http://username.imgur.com/all/ before visiting the front page that day results in a "not logged in" message, no matter what.
This effectively renders the "remember me" checkbox mostly worthless, since I have to either re-enter my login info or navigate away from the page, then come back, in order to do anything.
Customer support service by UserEcho