same problem over here. This is what I did for moving a 1.4.1 installation from A to B:
1) mirrored the opengoo from server A to server B
2) changed ownership on B
3) dumped/restored the database of A into B
3) adjusted config/config.php parameters with new DB_HOST and ROOT_URL
4) chmod 775 cache config tmp upload public/files (777 doesn't make a difference)
5) removed cache/autoloader.php
I get a blank page. If I define('DEBUG', true), I still get the blank page, and nothign shows up in cache/ .