Tweet Displaying 20 + Google Search Results Despite Setting

Since the weekend, when I do a Google search, Google returns 20 or more (I see 30 results) Results of research on the page. I checked my Google search rating parameter and was set to show 10 per page. I even re-recorded the result, but it shows me more than 20 results on one page.

I am not alone. Andy Beard also noted that (he sees 20 results) and they broke detailed screenshots. I posted a Flickr if you want to see.

What happens to me in Chrome for Mac version 6x. Not on any other browser I tested here. Andy told me that his entry using Firefox.

I'm not sure if this is an "experiment" or a bug. The thing is, I have a preference set to 10 results, I went there and re-recorded preference. It did not help. Google experiments should not override my settings like that. So I think it might be a bug.