I started noticing some changes in the layout of Adsense units running in my other blog as early as last week, but it’s only now that the Inside Adsense blog issued an official announcement. Adsense publishers now have the option to further customize the look of their Adsense units by specifying the shapes as either, square, slightly rounded or very rounded.
This new option is part of our ongoing effort to improve the look and feel of our ads. We’re also working to give you even more choices to customize your ad formats while maximizing revenue and user satisfaction. We hope you enjoy the new corner options, whether you choose to go edgy or bubbly.
To change the shape of your Adsense unit, just visit the “AdSense Setup” and choose the shape that blends well with the overall design of your blog or site.
This is actually a welcome development, but I would prefer more control over ad design.