[paulket]

Originally Posted by kh99

But as I added in my post above, in 4.1.8 it doesn't look like those values are used anywhere (the line has been commented out).

I just downloaded 4.1.8 again from the vBulletin.com customer area and at the bottom of the config.php(.new) file it says:

Images that exceed either dimension below will not be resized by vBulletin. If you need to resize larger images, alter these settings.
$config['Misc']['maxwidth'] = 2592;
$config['Misc']['maxheight'] = 1944;

But the problem is not having images that are too big re-sized, it is having images that should be uploaded at their original upload size kept from being resized. Maybe my frustration with the issue is keeping me from understanding what you are saying.