Errors in W3C Validator

Envato Customers Web and Code
1

Hi there. There are some errors in W3C Validator when I check my template like:

-Attribute mozallowfullscreen not allowed on element iframe at this point.( iframe - vimeo )

-Attribute webkitallowfullscreen not allowed on element iframe at this point…( iframe - vimeo )

-The frameborder attribute on the iframe element is obsolete. Use CSS instead. .( iframe - vimeo gmaps )

  • Bad value X-UA-Compatible for attribute http-equiv on element meta.

-Article lacks heading. Consider using h2-h6 elements to add identifying headings to all articles.

I don’t think it’s my fault here. If a remove the part with moz and webkit allowfullscrren will the iframe work? Or x-ua-compatible error, or frameborder? How can I fix that? And article tag needs heading? Ididn’t know that.
Well, all in all, what the reviewer will do when he/she will see those errors?

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bump

3

I’ve just checked other templates and I saw that they also have these errors, I assume they are allowed. Can anyone confirm this?

4

-Bad value X-UA-Compatible for attribute http-equiv on element meta. Solution:



–The frameborder attribute on the iframe element is obsolete. Use CSS instead. .( iframe – vimeo gmaps ) Solution - http://stackoverflow.com/questions/3601273/html5-and-frameborder


–Attribute mozallowfullscreen not allowed on element iframe at this point.( iframe – vimeo ) and -Attribute webkitallowfullscreen not allowed on element iframe at this point…( iframe – vimeo ) is not critical just ignore it.


-Article lacks heading. Consider using h2-h6 elements to add identifying headings to all articles. - Just use headings bro.

            


            

              
              
              
            


            

                
                
              


          

          

            

              



              
                  
                  
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oh never mind