, DCMonkey wrote

*snip*

It doesn't seem to have caused much of a problem with Windows 7's taskbar thumbnails, which show a close button when you hover over the tile.

The close button is a hard target there. It's too unsettling for me to position my mouse to click it, so I always use middle mouse button to close tabs there (which I believe also works to "close" apps in Win8 on the switcherbar).