I always install WordPress in a sub directory and then have the blog show up at the root level. This causes a problem with gravity forms because the "Edit" link will not include the sub directory.
For instance the edit link goes to:
http://example.com/wp-admin/admin.php?page=gravityforms.php&id=1
When it should go to:
http://example.com/DIRECTORY-WP-IS-INSTALLED/wp-admin/admin.php?page=gravityforms.php&id=1