I just received an email from Flickr about an upcoming change to their free accounts.
Here's what they write:
So if you have a free account on flickr make sure you have the large and or original sizes of your images stored on your own home drive(s). If not download them now!
We need to set cookies to make the site work. These cookies are essential.
External hosts may want to set cookies for viewing their content. These cookies are optional.