Google removed the "view image" button from image search results last night.
The change is essentially meant to frustrate users. Google has long been under fire from photographers and publishers who felt that image search allowed people to steal their pictures, and the removal of the view image button is one of many changes being made in response.
The measure is about satisfying people who have no idea at all how web browsers work and who are mad at an offensive button. Google suggests in a tweet that this was done to make Getty Images' lawyers happy. Their clients will presumably be pleased by its disappearance, then alarmed to find that nothing has changed, because the people who rip off photo agencies aren't sat there clicking the "view image" button.
Meanwhile, Google Images still allows sites to change the images that the cached thumbnails link to. Odd!
Illustration by SpaceFoxy; via Google Images.