However, as I'm sure you're aware, I've been kinda busy lately. So I haven't had a chance to fix the problem even though I knew it was there. That makes things doubly dangerous -- Murphy, the God of Bloody-Minded Perversity, being what he is, is most likely to strike during that period between when you've noticed a potential disaster, and when you take steps to prevent it.
However, over the years I've gotten pretty good at being bloody-minded myself, and took steps to thwart Murphy. I put "fix backups" on my Too Much To Do List with a due date of Saturday, February 17. That meant that if the hard drive was going to fail, the most GRRR! time for it to do so would be Friday night at around 11:30 -- so I downloaded a new backup program and installed it today. So far it seems to be working fine, and I have backups again.
Take that, Murphy. ;P