I'm seeing this across most but not all SERPS. Result #10 is repeated at the top of the 2nd page as #11.
Also seing that the same web site is having more than one page in the results, which was not the case previously. Anand
It's a placeholder. Google lost your site and just stuck one in twice in your spot until it finds yours again.
heh well one of the queries i'm looking at it's my site. #10 and #11.. The question becomes is #9 ranked higher or lower than #10-#11 internally for google... i.e. if google ranks sites 1-20, they might not display them in that order! Becasue to me having #10 and #11 seems perferable than having #9.