After the 1.01.30 update I have experienced very slow navigation to the point of not being usable. I have a shared folder with about 60 MKV Blu-ray quality files in a network shared folder. It worked very well before the update and now just to move to the next page is painfully slow. It can take up between 5 to 10 seconds to move to the next page of tiles.
One other adventure with this new release is that I use to use the stars in the tiles to mark the episodes that I watched, and those have been moved off the tiles. This is also making the experience worse with this update. Give use a way of marking watched episodes or movies on the tiles, and the would be very nice.