... that the thumbnails down the right of the Image Library home page are now all random pictures?
This is to bring the older picture to new users attention, and give a novel way of browsing. This feature will be enhanced further by having the image title displayed as a tooltip when the mouse hovers over the thumbnail.
This is just one of the first (hopefully uncontroversial) changes that will be applied to make the Image Library better to use.
The search facility has also been improved: clicking Advanced Search above gives a number of options, with new ones added to govern how the results are displayed. Most importantly however is a change in how the search is carried out - now it also encompasses the comments added to each picture, and not just the title and description as before.