What would cause Chrome autofill to stop working?

Question

I\'ve got a new site we\'re working that uses HTML5. Everything validates except for the LESS stylesheets and the Facebook tags. However, Chrome will not autofill properly.

Answer 1

Only Those elements which require autofill should be there inside the form.otherwise the autofill wont work.Bring only those textboxes under a form.if u already have form involving other elements,separate them and put new form tag around the textboxes which require autofill and nothing else inside it.