In IE 9 you have the ability to click and drag an open browser tab to the Windows 7 taskbar and pin the shortcut to the taskbar.
This has the effect of creating a pseudo-application experience where the shortcut can have it's own custom jumplist and is not grouped with other IE 9 browser tabs on the taskbar.
Windows uses the "shortcut icon" or "favicon" defined in the HTML for the icon on the taskbar. If no shortcut icon is defined, then the generic IE shortcut icon is used.
If you have a bunch of these shortcuts pinned to the taskbar that don't have different icons it can be confusing to the user which is which.
Can you change the icon of a pinned IE 9 web application? And how do you do it?