Welcome to AVForums running Xenforo 2.2. The upgrade from 2.1 was successful and finished in just 90 minutes, well before 8am. The most notable changes in 2.2 are listed in this post.
It depends what setting you use. If set to Auto then SD will be output unscaled. Besides, and assuming you have an LCD or plasma, your display will scale it anyway to its own native resolution.