I notice, on Windows 7, that Alt + Tab works differently if you are using one monitor than if you are using two.
With just one monitor it puts up a list and lets you cycle through the list. But with two monitors it only waits about one second with the list then brings the window up and hence cycling through the list is painful because every window keeps coming up.
Is there a way to make both single or dual monitor put up the full list and not open the window?