Google Images drives me NUTS -- up/down work totally unexpectedly, while space-bar works well. Cmd+Up/Down is broken totally. Why Google Images feels like the scrolling paradigm that has been used everywhere else, ever, doesn't work for rows of images, is beyond me...
Not directed in particular at this site, but the April Fools on the Web thing is so massively overdone, and has been for so many years, that if you're going to do an April Fools joke on the web, it had better be funny.
If there's a day I'd rather stay away from the web, this is it.
