I found this same question on a Jan. 27 post, but my response there was too
late so I am posting my experience again. The fix did not work for me....
This is exactly the problem I have in trying to save ISBN numbers which
often begin with a zero. I have tried all three methods you have suggested.
Once the text in the column appears correct, I save it in the xls format,
and can open it in excel correctly. But then I save it into the tab
delimited.txt file. When I open the text file in wordpad, I can see the
numbers are fine, with the leading zero correctly in place. Then I open
the file again in excel, and the zeros have been dropped. This is a
problem, because I must upload my books in a tab delimited file to Amazon,
but the zeros disappear, so they don't load my books.
Mo

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Moira Hoogeveen
Fossil Books
Toronto, ON Canada