i have a lot of images on my site, and was moving a bunch around, and deleting the original folders.
the plugin worked like a charm until i tried deleting a folder with another (empty) directory inside it.
up came a bunch of blank error messages, then a javascript error (sorry, did not record it) before the page came up with “cannot connect to database”.
checking the database through my hosting provider gave me a server error (500), whilst my other databases opened up fine.
I was able to fix it by creating a new database user and password via phpmyadmin & updating the credentials in wp-config.php.
(just changing the password for the old user allowed me to open the database in phpmyadmin, but going to the website, it took me to the wordpress installation screen. i quickly closed that and created the new user – panic, who me? :p )
scary, but ultimately no harm done. i shall run a backup before doing any more work though 