A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I see. Thanks for clarifying.
Before changing the default printer, however, I tried to see if I could reproduce the result with a new workbook. I could not (and it wasn't even necessary to use "Excel /O" to avoid the problem). I then tried to see whether the problem was specific to the sheet. It seems to afflict certain sheets in the workbook in question, but not other sheets. For the unaffected sheets, it was not necessary to choose a different default printer to avoid the problem. For the affected sheets, the nonstandard border colour seems to be the default regardless of which cell I choose, even if the cell is well outside of the range of the working area of the sheet. So it seems to be sheet-specific, but not range-specific as far as I can tell.
I'm assuming that this provides way more information than the original test of changing the default printer and issuing the command "Excel /O". Is this correct? Does it give any further clue as to the cause of the problem?