I'm pleased to report that switching from uPnP (MediaServer) connection to SMB seemed to solve the problem I was having with my favourites being rescanned whenever the NAS was powered down. Now I'm connecting to it via SMB, the library remains constant and I no longer have to go back and fix misidentifications every time it decides to rebuild the library.
Can I make one feature suggestion? I love the fact that you can now switch the 'Show Previously Watched' option on and off but can you make this work on a favourite by favourite basis? I'd rather like to be able to control the app so that it only shows titles in my 'Movies' favourite on the front page and not titles in other favourites. Thanks
Btw - I also noticed that the 'folder.jpg' trick for adding a custom thumbnail to the favourite doesn't work on uPnP connections. Once I switched to SMB, it started working
Thanks again for a simply superb app! Infuse Pro is so darned good that it's made my buy a second Apple TV 4 just to run it in another room