Do you have SMS 2003 in your infrastructure?
Are you patching through SMS 2003?
Are you using the Inventory Tool for Microsoft Updates for Patching?
Have you upgraded to ITMU Revision 3?
If you have answered yes to the first 3 questions and no to the last one, you should migrate to this version right away. This is a critical update that does not only improve performance but the old CAB structure can no longer hold all of the data needed to keep your infrastructure patched!
The sites you should visit to learn more about this upgrade are:
Hurry and implement this upgrade into your infrastructure as :
"After March 2007 the existing scan file will no longer be maintained, and new updates can only be obtained from the new catalog. The new version of ITMU will be the way that SMS customers take advantage of this new catalog"