I took this bit of code from the KusabaX support board:

<?php
error_reporting(E_ALL);
ini_set("display_errors", 1);
include("file_with_errors.php");
?>

and I plugged in wakaba.pl because my server doesn't have any error logs that I can find even though in my PHP info error_log in On in both local and master value. I didn't think of it but it makes sense now that a PHP error reporting script wouldn't work for perl.

So I am back at square one. I can't check the php.ini but the PHP info in my vbulletin admincp says upload_max_filesize is 8M which I guess is related. Whether that means megabits or megabytes I don't know, but like I said I get 500 server errors from files as low as 2 megabytes while there has been one upload of just over 6.

I can't make sense of it