WP 2.5 – Pages Don’t Work (bug)

None of the pages work after upgrading from 2.3 to 2.5.

I did a var_dump of the $_post variablein get_post() function and it is able to find a post. But it still says on the page that no posts found. It doesn’t work with permalinks as I found in a post on these forums. You also need the preview=true.

Works: https://www.xigga.com/index.php?page_id=2&preview=true
Doesn’t work: https://www.xigga.com/index.php/about/

My permalink is: /index.php/%postname%/

I couldn’t find a bug submission page so I’m posting here.