Yes things that were broken for me by default are explorer, notepad (using it with files over a network), calendar pop up, and start menu. And don't get me star

Yes things that were broken for me by default are explorer, notepad (using it with files over a network), calendar pop up, and start menu. And don't get me started on the UI of the sound/battery/network widget. Every day I'm reminded of something I think Jo Armstrong said in a talk, paraphrased "Ah, an update! Maybe they made it better ;)".