Dave Peterson wrote:
I've never seen excel add a 1 to the filename (from xl95 to xl2003).

But I have seen email clients store attachments in temporary files with an
additional numbers following the file name.

Could it be that someone opened it from an attachment and not the original
workbook? Then the MRU list would be pointed to the file in this temporary
folder.

I like to put:
=cell("Filename",a1)
in an empty cell to see where the file really lives.

If none of this helps, you may want to share the version of excel you're using.
Maybe someone who has had that version has seen the problem and knows a
solution.

Tx, I will try that tomorrow. Well, I think it's Excel 97 but I am not
sure. I asked someone who works in IT (who was in a big hurry) and they
also said they had never seen anything like that before...now I wonder
if it's a bug or something. That's interesting u say Excel doesn't
normally ad a 1 to a filename, perhaps it's more likely that it's not
an excel problem per se.
All I know is that this whole thingamajig is driving me insane!