Paul
I would suspect you need to get this out to a new workbook, not just rebuild
what you have. It sound like perhaps a style is corrupt or similar which is
not being rectified by your 'formula/format' rebuild

Signature
HTH
Nick Hodge
Microsoft MVP - Excel
Southampton, England
nick_hodgeTAKETHISOUT@zen.co.uk.ANDTHIS
>I have a relatively small and simple workbook that has now gone corrupted
>for
[quoted text clipped - 4 lines]
>
> Paul