2011 theme random headers and featured image

Can I use the featured image option for this on posts and pages?

this should be possible – check if your featured images have a minimum width of 1000px.

Thanks alchymyth much appreciated

My image was over 1000px in width when I cropped it too 1000px it displayed. So looks like need to be specific with featured image size for the header image area.

Hi,
Before you can see the forest for just trees, your first step should be to fix your forest of errors:
https://validator.w3.org/check?uri=http%3A%2F%2Fpersonis.co%2F&charset=%28detect+automatically%29&doctype=Inline&ss=1&outline=1&group=0&No200=1&verbose=1&user-agent=W3C_Validator%2F1.2