Excel-Fix - now that was quick
Apparently, the „display bug” in Microsoft Excel 2007 has been fixed:
As of today, fixes for this issue in Excel 2007 and Excel Services 2007 are available for downloadCalculation Issue Update (Fix Available)
We are in the process of adding this fix to Microsoft Update so that it will get automatically pushed to users running Excel 2007 or Excel Services 2007. Additionally, the fix will also be contained in the first service pack of Office 2007 when it is released (the release date for SP1 of Office 2007 has not been finalized).