I thought we looked for ORIG_PATH_INFO as well, but it looks like not. But it's a quick change. Line 1310 of libs/ubbthreads.inc.php is where it needs to be changed:

PHP Code

$PATH_INFO = array_get($_SERVER, 'PATH_INFO', '');

Change to:

PHP Code

$PATH_INFO = array_get($_SERVER, 'ORIG_PATH_INFO', '');