Spent the evening updating my WordPress installation.  I had a few moments of worrying, when I navigated to the home page and nothing came up.  Turns out that during the uploading of new files, the old themes were deleted.  Once I logged into the admin side and reassigned a theme, things were back to normal.   Yah!

I’ve another mental note to make:  don’t put blankets and other bedding in the washer after nine on a work night.