On Thu, May 23, 2013 at 8:20 AM, Federico Leva (Nemo) <nemowiki@gmail.com> wrote:
2) removed any UI path to the advanced search and to the search for free/CC images, so that now you can find them only on the advanced search, by knowing its URL: http://www.flickr.com/search/advanced/ ;

That's not true. Advanced search is still available just below the search box, every time you make a search. Cf. http://www.flickr.com/search/?q=dogs

They're probably doing this because they assume that you probably only need advanced search if you didn't find what you wanted on regular search. Seems like a pretty safe assumption from a UX perspetive. Obviously that doesn't account for the use case of Commons people hunting for photos, but that's hardly the majority of their users. 

Steven Walling