Does anyone know why this theme is adding a ’#’ in my permalink urls?
It (#) is a result of google crawlable ajax. Breafly after you go another pages it helps to inspect where you are.
Also http://themes.themeton.com/squaregrid/#/sample-page/ and http://themes.themeton.com/squaregrid/sample-page/ are absolutely identical. You can type and try every page url without #! on your address bar.
Ajax provides a method for exchanging data asynchronously between browser and server to avoid full page reloads.
In our case, header and footer doesn’t loading when we changing page of site.