There’s a weird regression in Google Image Search if you use Chrome 27+ and enable “Extended Instant API” in chrome://flags. Extended Instant is a feature I’ve mentioned a few months ago and it’s still a work in progress. It integrates Chrome with Google Search, replaces the new tab page with a special version of the Google homepage and removes the navigation bar and the search box from Google’s search pages.
Back to Google Image Search. For some reason, when Extended Instant is enabled, Google Image Search switches to the old interface: thumbnails are smaller and you can mouse over to see more details about the images. When you click an image result, Google sends you to a new page that loads the original image file.