I'd ask several questions:

1) Are they using Excel 2007 to open the workbook?
2) Is there a workbook_open event that runs to unhide columns?

--
HTH,

Barb Reinhardt



"Concerned friend" wrote:

Has anyone had any problem with forwarding an Excel 2007 spreadsheet in which
a hidden column when forwarded in an email then shows the recipient the
hidden information. Can a hidden column, "unhide" on its own?