[jgommel]

Originally Posted by UberMensch

I've had a crack at fixing our problem, and the attached product appears to work.

The changes were:

In Plugin:
newthread_post_start

Replace:

PHP Code:

$forumids = explode(",", $forms['forumid']); 


With: (Or delete it)

PHP Code:

// $forumids = explode(",", $forms['forumid']); 


Replace:

PHP Code:

    if($forms['required'] == 1 && empty($value))
    {
       eval(standard_error(fetch_error('fill_in_custom_thread_field')));
    } 


With:

PHP Code:

    $forumids = explode(",", $forms['forumid']);

    if($forms['required'] == 1 && empty($value) && in_array($foruminfo['forumid'], $forumids))
    {
       eval(standard_error(fetch_error('fill_in_custom_thread_field')));
    } 


Save Plugin:
newthread_post_start

It works for me (vB3.6.8 PL2), could someone confirm with their board also?

So far, your updated product xml appears to be working just fine. Thanks.