Huh? I've been locked out of my Flickr for ages, I get the odd mail from them but I can't get through the nightmare of secret questions, which I've forgotten, too, and alternate email nonsense to reset my password.
I can still see everyone's images at the correct sizes by clicking the 'all sizes' magnifying glass button above each picture, I'm only viewing them while not signed in so, no idea why you can't see your own images at their original sizes.