Today I upgraded my CC install from 5.1.5 to 5.2.7. I had thought I had fully tested the new version in a development install, and verified that PayPal checkout was working. I only have the PayPal plugin enabled, not the gateway.   However I have discovered that payments via the paypal account are not working (Credit card payments are). The issue seems to be that when PayPal passes back to my site, the user is presented with a checkout screen where they are asked to log in or enter their billi