[Clytie]

You mean you don't have confirmation that the embedded PayPal feature actually works in ebay? It works fine for me when I use Camino. I gather it works for another user in Firefox. It's very convenient: I can see why they implemented it. It's also less confusing, since you don't appear to "leave" the ebay site to go to an "external" site, and this may reassure some users.