I started an upgrade to 3.7.1 today and WordPress updated the site to 3.8.0.

From what I read, the automatic update introduced in 3.7.0 will not automatically update the site to a new level, only to a new version of a level. You have to initiate updates to a new level.

The admin area has been redone. The default color scheme is pretty ugly. Actually, it is very hard on the eyes, but you now have a choice of 8 different color schemes in your user profile. Some of the other color schemes are not bad.

Thus far, I don't see any problems.