For some reason the Twenty Eleven theme will display a blank gray home page.
Its only on that theme, Ive been able to try other themes with no issue.
I viewed the browser source and this was the very last line:
With no ending >
So I checked the theme files and this was the body line:
<body <?php body_class(); ?>>
If I changed it to just <body> The home page will appear a little more such as the nav, but the content is not there.
I tried re-installing, all files were given 777 permissions.