Perhaps germany was the last country with the old images-search layout. Until today...
I could see the new layout (.de) actually in chrome and explorer but not with firefox. A lot of people confirmed it via twitter. But there are actuelly some change going on - seems that google just rolles it out.
I was surprised when I clicked a thumbnail. The picture is not shown in an iFrame as in the .com-imagesearch. The source-website is loaded directly.
@tedster: ah, sorry, yes, true. There is still the frameset, but the half-transparent dark layer isn't shown and the "single" picture in front of the layer is missing. It's just the source-website in a frameset.