There seems to be this ongoing issue with Google Image search since February for a wide number of searchers. The issue is, when you go to Google Image search, search and click on an image, instead of it showing you the preview within the screen, it would take you to the image in a new window.
The issue was reported in the Google Web Search Help forums back in February and since then we have three pages of complaints from searchers. Not a single response from Google.
Bluequoll, a Google Top Contributor said he reported it to Googlers several times but they didn’t respond. He wrote:
I am not sure why Google has not responded, normally these complaints and this scale, get responses.
Forum discussion at Google Web Search Help.