Hi!
I'll summarize so that others can add and refine the issue.
Summary to date is that problems arise if there is a single worksheet
workbook where that sheet has the same name as the workbook (other
than the .xls).
The problem is one of CELL("filename",A1), returning (eg)
C:\My Files\NewsGroups\Delete2 OK.xls
[note the missing [ ] around the file name and the missing worksheet
name.
In normal situations where the sheet has a different name than the
workbook or where there are more than one sheet the formula would
return (eg)
C:\My Files\NewsGroups\[Delete2 OK.xls]Delete2 OK
This problem is appearing across all versions of Excel 97, 2000, 2002
and 2003.
It is also appearing in Windows XP, MacXL04, and Windows 98SE
The only case where the problem has not been evidenced appears to be
Excel 2000 on Windows 2000.
Severity of the problem must be rated as low. It appears to be the
first time it has been reported and I wouldn't expect many users would
ever have a single sheet workbook with the sheet having the same name
as the file name. We have a formula workaround for returning the file
name and the sheet name in all cases although the formulas are not
very friendly. VBA does not appear to have any problems with these
unusual workbooks.