category display problem on magento 1.4

Question

Hi,

I created more than 30 categories, and added more than 1000 products to them.

Less than a week later, I upgraded to Magento 1.4.1 from 1.4.0. Now I can able to categories and products. While editing, I can see all the categories, but the old products don't show the newly created categories on the edit page. Please point out to me What the problem is with the system.

Thanks