Magento

All upgrade went fine - but after importing all products, all products do not show up on frontend anymore. I can see all products in backend, they are enebled, in stock, and have at least one category.

What went wrong??

same here, did you find a solution?

I have same problem.

If i click on edit Product and then right away without changing any setting save it, then it will show frontend.

Check your products - what is the visibility, are they enabled, in stock and assigned to a website? Did you import to the correct store view?

The problem is I already imported 6,000products, and how to fast add the products to new added websites? it is trouble now

You are in trouble lad, specially if already imported over 6000 products, hope you can fix this issue in less than a second, have faith and patience.

cuban cigars

Cigars

For me the cause seemed to be having selected a locale different than the locale of the exported data (I think mainly column Visibility is the problem).
See also the post on my website:  Products have disappeared after import? A possible solution!