Google is testing showing icons in the search bar filters next to the all, news, maps, images, shopping and other buttons. This takes them back to a user interface they had in 2011, which they shortly dropped a year or so later.

Here is a screen shot from Joe Youngblood on Twitter of the design test, which I cannot replicate:

Here is what I see:

Joe is not the only one seeing this test, here are others on Twitter:

Do you see this as well? I tried numerous browsers and operating systems, I cannot replicate this.

Forum discussion at Twitter.