There are still some little weirdnesses, here and there. Bing Maps, while mostly a fine substitute for Google Maps, lacks public transit or bike options. Not enough apps take advantage of Live Tiles. Multitasking is still not done: Mango uses a WebOS-lookalike for this, in which you hold down the back button and are presented with big thumbnails of your currently-running apps which you can swipe through and select. That's great, in theory, but it has some problems. Apps take up multiple thumbnail slots, sometimes, for no reason I can tell. And, more to the point, multitasking isn't really multitasking. That's a tired thing to say, I know, but it's true: Windows Phone apps have to be adjusted to take advantage of Mango, and just about none of them have. Rdio, for example, can't play music in the background while you're reading your email or browsing the internet, and if you switch to another app and then switch back to it, you're taken to the Rdio homescreen, at which point you have to search for the song you were listening to all over again. That sucks. Same problem with other apps like Twitter and Kindle. Weirder, sometimes the back button would just refuse to take me into the multitasking thumbnail view, leaving me to hammer away on it for awhile and then give up.