Among other changes, there is now a $url variable in the index.php file. This has to be set to wherever the script is installed and enables simple symlinking of index.php into all folders to be listed.
The script is now XHTML 1.0 Strict compliant. The layout now uses more CSS. Some new icons were added. PDF thumbnails are now created if both GhostScript and ImageMagick are installed in your Web server's PATH.