Fixed Using the meta element to specify the document-wide default language is obsolete see http://nimbupani.com/declaring-languages-in-html-5.html
Removed unused div in h1/h2 because element div are not allowed in h1 or h2 (in this context)
Added itemscope for itemprops
Moved h2 outside ul because it's illegal but articles need an header
Inversed class because we can't have div inside h2
Replaced div with correct ul tag
Merge branch 'master' into w3cvalidation
Merge pull request #6 from code-troopers/w3cvalidation

It looks of for me, tags text on blog post header is a little smaller now, but it still looks good enough to me.