This is a known bug that required vba code to re-apply formatting.
XL2000: Changing a PivotChart Removes Series Formatting
http://support.microsoft.com/?id=215904
Cheers
Andy
> Is there any way to not lose border formatting after refreshing a Pivot
> Table? I can keep the outside borders but the linside lines awlays have to
> be placed back.
>
> Thank you.

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Andy Pope, Microsoft MVP - Excel
http://www.andypope.info