Thanks for the “pointer,” Bob. The update didn’t work for the problem, though. Strange one, this is. Windows 7 x64-SP1 (forgot to include that little tidbit).
Plus, I haven’t been able to duplicate it on my work computer, which is Windows 7 original release 32bit, but that one doesn’t have the number of drives (C: through U:) listed in the Folder Tree, which may be part of it.