I tried this on vb4.2.0: https://vborg.vbsupport.ru/showpost....91&postcount=8 (the link from the first post) and it seems to work. But the RSS feed is cached, so you would either have to wait to see the result of adding that plugin, or else truncate the externalcache table.
The only difference between what's in that post and what we use is the last line.
Code:
$hook_query_fields .= ",CONCAT(LEFT(post.pagetext,400),' ........\n\n[ b]For the full text, visit [ url=www.vbulletin.org]vBulletin.org[/url][/b]') AS message";
It does not work with Vbulletin 4.2.1, it can not link to the thread.