I'm working on an Ubercart site and am having a problem with all data not being indexed for search.  Using the default Dupal search, if I search on the SKU field, I get results on some of the products, but not all.  I've rebuild the index and re-run cron multiple times, and I've also verified that data is entered correctly in the SKU field for all products, but for some reason I still don't get results returned on some of the SKU numbers.  Can anybody explain possible reasons why this might be happening or give me a place I could start looking?

Thanks.

Steve