Do I get bonus points for fixing this myself?


In the file /scripts/filemanager.inc.php, add this code after line 272:
PHP Code
if ($file_size == '') {
	$file_size = filesize("{$config['FULL_PATH']}/tmp/$newname");
}


It should be just before the line that reads:
PHP Code
 $query = "


Of course, be sure to make a copy of the original file in case you really break some thing. I believe this same script is used in image gallery as well. Hopefully this fix will be in 7.4.2.