Okay, when I got TinkerTool to help me find the booger, sure enough, it's a hidden file. I'm enough of a frosh not to know how, to turn off the hidden bit of a file. So what I've done is much as what you've suggested: delete the hidden file; create a new file by a different name; and rename the new file. Yes, overkill, perhaps. It worked. Thank you, very much, for your very kind, patient, and gracious help!
3/12/10 at 4:23pm