This problem was first fixed in a hotfix that is now contained in a service pack. If you installed the latest Office 2003 service pack, you do not have to install the hotfix.
Service pack information
This problem is corrected in Office 2003 Service Pack 2.
To resolve this problem, obtain the latest service pack for Office 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
870924 How to obtain the latest service pack for Office 2003
After you install the service pack, follow the steps that are listed in the "More Information" section to set the DisableAutoSortOptimization registry key and to enable the hotfix.
Hotfix information
How to obtain the hotfix
This issue is fixed in the Excel 2003 post-Service Pack 1 Hotfix Package that is dated September 3, 2004. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
885252 Description of the Excel 2003 post-Service Pack 1 hotfix package: September 3, 2004
After you install this hotfix, follow the steps that are listed in the "More Information" section to set the DisableAutoSortOptimization registry key and to enable the hotfix.