I have found 3 bugs in new Windows Live Mail:
1. Goto "Layout -> Folder Pane" and enable/disable "Use Compact View for Folder Pane" option and then click on "Apply" button but don't close it. It'll totally disturb the left side pane.
2. Again goto "Layout -> Active Search" and enable/disable "Show Active Search pane" option and click on "Apply" button but don't close the options window. It'll not show the Active Search at right side until you close the options window. As soon as you click on OK or on Close button, you'll get Active Search at right side pane.