BUG FIX FOR 3.6 SERIES
Google now requires that the admin area be secure when setting up Google Checkout. Currently, if your https url is different than your http url (i.e. https://secure.domain.tld vs http://www.domain.tld) you might get logged out of the admin area when enabling Google Checkout. To ensure that you do not have this happen, make sure you log in to your admin area via your https url when setting up Google Checkout.
