Forum "File not recognized as part of vBulletin" for forum.php?
 

I did a "suspect file versions" scan under maintenance and got two messages for the base forum directory:

forum.php File not recognized as part of vBulletin
index.php File does not contain expected contents

what the hell? The index.php page is a brand new copy from the latest vB release. And i'm pretty sure forum.php is legit, no?