Hello I have a wordpress website. Recently i checked my Google webmaster and saw increase in structures data errors of these kinds: Data Type: Hatom Source: markup: microformats.org Items With Error:1608 Further opening it i saw: Error Type: Missing Update and Missing Author on 4 pages of website. I have author visible on each post with date too. How to solve these errors??? Are these errors harmful for my website??? Thanks Mani Kunis