Are you getting Plex Media Server crashes still on Preview thumbnail generation ?
I tried sample given above here Plex Server Crashing Because of Thumbnail Generation - #27 by ibrewster and it did not crash for me (I am using a development build but this area has not changed for a while)
May be you are now getting the crashes referebced by @Olli above Plex Server Crashing Because of Thumbnail Generation - #49 by Olli
If thumb preview generation is still causing crashes, would need a fresh sample file to test to reproduce the problem
