There have been substantial changes on the Flickr website this week. Some of these, like upping the free storage limit to 1TB per person, are more in the background; others are very visible. I remember that, a few months ago, they experimented with displaying images in a “wall of photos” style and had been wondering where it had gone; it was obviously temporarily pulled back as it is a key visual feature of the new design.
Overall, I am very positive about the changes although I see they persist with their aversion to penultimate vowels in words ending with R! More details on the Flickr blog or take a look at my profile on the site.