Exactly. This solved it for me. But updating the WP e-commerce plugin might override it, hence it seems just a workaround for now.
Hi rdourado
Can you give some more details on how you solved this?
I see lots of fields in the post_meta table, but it all looks OK. There must be some issue with the backend when trying to update the value.
I have the very same issues.
I can add a value in the backend the first time, but then it can never be changed or deleted from there again.
We use field groups with some conditions and I can see the fields in the post_meta table. But updating/deleting the values from the editor view does not work.
We use it with the WP e-commerce to add specifications to a product.