Ok, just upgraded to v7 and so far this seems to have not been a good move. I've had to remove Paypal as a payment option from every single listing because I keep getting notified that I haven't supplied a valid Paypal email address. Well, I friggin' have! Exactly the same account settings as in v6, payment details in account settings are the same, it is the correct address - unless I've migrated to a parallel universe where nothing is as it's written.
The only way I can get the listings to upload is remove Paypal as the payment option. This just ain't doing it for me, unsurprisingly.
Need to get this sorted asap, guys.