Windows 7: Taskbar Highlighting

Windows 7 has a feature where icons for running programs in the taskbar are highlighted in an orange/yellow colour when the window requires attention. However, if, as in the attached example, I have multiple windows open in that application (IE in this case), how am I supposed to know which window it is that needs attention?

Thanks - Rowan

I thought it told you in the list?

Do you mean the list which pops up when you hover your mouse over the icon? If so, I can't see how. The image I attached showed this list - where does it identify the window that requires attention?

If you mean something else by "the list", what exactly?

Thanks - Rowan