Google this weekend pushed out a new design for the arrows, also known as nessie, in their AdSense ads.
The AdSense ads arrows now have rounded borders.
On Saturday, publishers at WebmasterWorld began to notice and they like them. It does add some little detail to the design, and Google is known to constantly tweak things in the AdSense designs to encourage increase click through rates.
Here are pictures of the new ad units:
Forum discussion at WebmasterWorld.