Go to your User Stats clicking the name on the top. If you don't have enough questions with accepted and unaccepted answers (like my case right now), just go to some user who have.
If you move the mouse over the number of answers and there is an accepted answer, it will say so. If there isn't, nothing will pop. In stackoverflow there's a much simpler way to see that: the accepted answers are colored different.
To whom it may interest, I just found out how to fix this for ourselves.
Grab your favorite CSS editor plugin for your browser (in my case I'm experimenting with Personalized Web for Google Chrome) and add the following CSS lines to it:
Unity Answers uses StackExchange, a product from the makers of StackOverflow. Not all stackoverflow features are in stackexchange yet. meta.stackexchange.com has an endless list of people talking about this stuff.