I would suggest two things.
1. Edit your config-int.php file and make sure all the define boxes to use vb3 etc are all set to off.
2. Possible you could be having a server issue with php shutting down. I got a link to download the php file which indicates the server's PHP is shutting down. Try this and see if it helps. http://www.photopost.com/forum/1219346-post2.html
This is what I would really suspect but your server error logs which your host could help you with should give an indication of the true error which would help us pin point the exaxt error.