Updating some of my listings - I went into a book listing in edit mode and changed various bits of information, including putting the ISBN into the new barcode box.
Accepted the changes and nothing appeared to be done with the code - I wasn't prompted with the information as I expected. So I clicked on the "view auction" link to see what it had done and when looking at the live listing I *then* got the product info panel with "we would appreciate etc" prompting me to update the info, which I did, and confirm the stock photo, which I did.
I don't know if that's how you meant it to work, but if I hadn't clicked to view the listing I would not have seen the prompt to update the stock info.
FYI.