WordPress 3.1 adds a few new features, though the one you'll notice sooner than the others is the Admin Bar (seen above). The bar appears on your blog when you're logged in, and gives you access to adding new pages/posts, reviewing comments, and changing the appearance of your blog with a couple easy clicks.
But, also annoying, right? Who wants that bar cluttering up their blog (though to be clear it only shows up for logged in users, so anyone coming across your blog won't see the blog).
Good news! You can easily remove the Admin bar, read on to find out how.
You'll notice that your username (that's the name you use to log into your blog) is the first option on the Admin Bar. Click on it, and you'll see a couple of options. The one you're interested in is "Edit My Profile." Click on that.