Thanks, I'll answer in a slightly different order.
Earl said:
Dan,
Intriguing. I'm pretty sure you'll have checked this, but in the offending
workbooks, is there a menu item, to wit: Format - Sheet - - Delete
Background? If you set a background image, does it override this ersatz
color? What happens when you remove it?
Yes, when I tried it, it did not show a Delete Background option, only
the option to add one. When I did add one and delete it, it went back
to it looking gray.
If you set a cell's background color to "No Color" (Format - Cells -
Patterns), do you get the bogus color, or does it become white?
Two cases occur in different sheets. In one, it's already set to No
Color, and selecting it again has no effect. In part of another sheet,
Format - Cells - Patterns thinks it's blue, and when I click OK, it
actually changes it to blue, but when I change it to No Color, it
remains gray.
Does all this happen no matter how far down or across the worksheet you go?
Yes.
If you insert rows or columns, do they get the color? How about if you
insert a worksheet?
Yes. And (I should have thought of this!) yes, a new inserted sheet
has it too!
Your statement about it being or not being workbook-wide wasn't clear to me.
Does this color appear in all the sheets of a given workbook, or just some?
I was just saying that it's in all the sheets, and therefore I was
guessing it's workbook-wide, but that didn't prove it wasn't a
single-sheet setting that happened to be set on all sheets. But
finding the color in a newly-added sheet now proves that it's
definitely workbook-wide.
Does setting tab colors have any effect?
I didn't know what a tab color was, so I looked it up. I'm in Excel
2000, and I gather that it does not have tab colors. But Lotus 1-2-3
had it, which may explain one of the workbooks, which has always been
light gray since the first time I saw it.
I have to confess that the other workbook, which is now sort of
brownish-gray, became that way on a user's copy a few weeks ago while I
was on vacation, and I haven't yet asked her whether she knowingly did
something! I'm guessing that she, in fact, did not -- so I thought I'd
rather research it first, in case she doesn't know how it happened and
she asks me how to fix it. But since there has been no quick answer,
I'll go ahead and ask her.
Are there gridlines? If so, are they really gridlines, or have borders been
set?
There are no set borders in any sheets, but on some sheets I see
gridlines and on others I don't. Perhaps this could be inherited from
Lotus 1-2-3 too, because in copies of the workbook before the change
happened, I see the same gridlines and lack of gridlines even with a
normal white background.
Do you instead wish you'd taken up archery?
Heh heh... No, as you say, troubleshooting is "intriguing".
If you have it in your version of Excel, have you tried "Open and Repair?"
It's in different places. In XL2002, it's in the Open button dropdown in
the File - Open dialog.
In my Excel 2000, I found Detect and Repair, but not Open and Repair.
Detect and Repair seems to want to repair Excel itself rather than the
current document, so I'm afraid to use it. Anyway, the gray is not
Excel-wide.