That warning is returned by eBay, so we cannot easily change the text to make it specific for GarageSale. Doing so would be a bigger change, maybe something we can do for GarageSale 8.
But you are right, we should change the text to something else and use a different color. You are still able to list with warnings, though.
did not know that you could still list the item… which is rather pointless, due to the problems about this HTTPS controversy and why it is all changing… but realise that you program find now error, and then ebay says an problem.