Replace bxGallery and FancyBox with PhotosetGrid and ColorBox
Fix height of Administration Tool boxes
Fix $PHP_SELF so it works in subdirectories (the use basename() produced invalid links when viewing pages in the ext/ directory)
Let PHP handle the session garbage collection to have the same behaviour as file based sessions regarding session life time
Don't accept GET and POST session IDs if SESSION_FORCE_COOKIE_USE is true
Only set the session_id if it differs to the cookie value (session_id($id) always sends a cookie in session_start() and SID is always set, so we do this only when needed)
If SESSION_FORCE_COOKIE_USE is enabled and the first request is made to login.php, no cookie is found (but is set) so perform another check before redirecting directly to the cookie_usage.php page
New Content Modules implementation for the Account, Checkout Success, and Login pages.