I have noticed that the media keeps playing and LMCE keeps responding up to the moment the Media Directors actually shuts down.
I don't know if this is the cause of my trouble, but I did answer a question about a found "fileserver" at the moment the Core shut down. (I know this is not a smart thing to do, but I wanted to test)
I am speculating that this may have corrupted the MySQL database as LMCE never did reboot after this, just came a message that it couldn't connect to MySQL.
Any answers, tips, similar experiences?