[funrun]

The code above does not work with the version of Vb installed on my site (newest version as of today's date.)

Here is the code that worked for me, as an exact copy/paste with all spacings:
This line

		if ($threadinfo['firstpostid'] == $postinfo['postid'] AND $edit['title'] != '' AND ($postinfo['dateline'] + $vbulletin->options['editthreadtitlelimit'] * 60) > TIMENOW)

Changed to

		if ($threadinfo['firstpostid'] == $postinfo['postid'] AND $edit['title'] != '' AND ($vbulletin->options['editthreadtitlelimit'] == 0 OR ($postinfo['dateline'] + $vbulletin->options['editthreadtitlelimit'] * 60) > TIMENOW))

and

This line

	if ($isfirstpost AND $postinfo['title'] == '' AND ($postinfo['dateline'] + $vbulletin->options['editthreadtitlelimit'] * 60) > TIMENOW)

Changed to

	if ($isfirstpost AND $postinfo['title'] == '' AND ($vbulletin->options['editthreadtitlelimit'] == 0 OR ($postinfo['dateline'] + $vbulletin->options['editthreadtitlelimit'] * 60) > TIMENOW))