A Couple things that need some attention/correction:

Thanks Notifications

Any option to turn this off?, I looked around but was unable to locate an option to do so.
A little unnerving to look up and see that you have 175 unread notifications.

Thumbnails

Previously if you uploaded a Large Poster (500kB) by itself as an attachment for example, it remained as a Thumbnail. With the upgrade, all of those single Thumbnails are now displaying as a reduced, but still hefty image instead of a simple thumbnail.