I just installed as well. Install went great and index.php worked. Then I changed the file permissions for fp-content from chmod 755 to 666 and got a blank index. Chmod’ed back to 755 and there was content on index.php again. To enable file uploads I ended up using 777 which also allowed index.php to work.
Basicaly the public needs to have execute priviliges on wp-content.
Hope this is helpful.
