Change is a constant with Google, and not just from the search algorithms side of things. Further, some of the changes may not be widely announced unless you on the right lists. ..or that’s just an information overload issue for me.
From the looks of things it appears that the Google designers have changed up the look of the Google Analytics user interface. As you can see from the image, the left nav area and top menus are all sporting the new “colored bar” look and the entire style looks a bit more “flat”… as is the trend now it seems.
For me anyway, there may be some undiscovered changes within the applications. They have recently added Analytics data to the G+ platform, so there may be more rolled into this update than meets the eye. If you know of any, please post int he comments below.