One of the few things about Vista that just drives me crazy is the problems with Windows Explorer.
Unfortunately these often seem to get corrupted somehow, which is the main reason everything goes haywire.
That way if you screw anything up, you could just restore the backup by double-clicking on it.
Download, install, and then launch the ExplorerView tool.
Check the box for “Disallow Explorer to Auto-Detect Folder Contents”, and you are done.
Looks like the folder is back to normal again…
Download ExplorerView from sdsoftware.org (discontinued)