Just a minor observation, but one for the MS fix list:

The three (or two if you have no settings) icons that appear when you hover over a Gadget are incorrectly placed for detached Gadgets after Sidebar is reloaded. They're shifted left 6 pixels.

To reproduce this:

1. Add the Calendar Gadget
2. Detach it from the Sidebar
3. Exit Sidebar
4. Load Sidebar
5. Hover the mouse over the Calender Gadget

You'll see the icons are in the wrong place. To correct them drag the Gadget slightly.