I've been running PMS on a Mac Mini for a while and I was just experimenting with setting up my library on my Synology NAS instead.
I scanned one of my libraries but I have found that it is showing an incorrect release date for many movies. Often it shows them as 1970 or another year that is simply wrong.
If I edit an individual movie however, the release date is correct.
The year also shows incorrectly when I tried viewing from the iOS Plex client, so I assume this is a bug in the Synology PMS?
I'm running latest DiskStation on a DS1513+ and latest PMS downloaded today.