Google, as always, is testing user interfaces and here are two more tests. The first is Google is testing a "next" button, instead of showing the pages available, in the mobile search interface. The second is Google is testing that boxy navigation bar again.
Next Button On Mobile Search Results:
Spotted by Nedas Petravičius and posted on Google+, Google is testing showing the next button only on the bottom of the mobile search results page. This is instead of showing the pagination links.
Here is a screen shot:
I assume this may work better on smart phones.
The Box Navigation
We saw this before back in May but now more people are seeing it, including Brian Ussery who posted this on Google+.
Here is a screen shot:
I suspect the box navigation will be released soon to all users but I can be wrong.
Forum discussion at Google+.