I have a blog, say its address is www.abc.com and suddenly google webmaster tool reported that there is url duplication at www.abc.com/pages/2 I check the url and really surprised that www.abc.com/pages/2 contains the same as my homepage at www.abc.com I have no idea why suddenly there is such page. I never created it. Please help me on how to remove that duplicate page. Thanks for any suggestion.