Holy cow, I wrote a book!
One of the features added to the Explorer Address Bar in Windows Vista
is the ability to navigate quickly to an item by clicking on its name,
or navigate to a folder's children by clicking the arrow that
appears next to the item and selecting your destination.
One customer reported that there appeared to be a problem with the
Switch to Classic View, and then
click the arrow next to the words
The result is a dropdown menu that shows some
but not all of the Control Panel applications.
Is this a bug?
No, everything is behaving normally.
Recall that the dropdown menu shows things that you can navigate to;
in other words, it shows you a list of subfolders of the Control Panel.
Since you can't navigate to non-folders, they aren't listed as options.
Notice, for example, that when you go to your Documents folder
and click the dropdown arrow,
not all of your documents show up in the menu.
Only things which Explorer can navigate to appear in the menu
(mostly subfolders but occasionally you'll find
subfolder-like items such as compressed folders).
The customer replied with a simple,
"Thanks. That makes sense."
The so-called God Mode.