Can't add Soundcloud service possibly because of + [plus] in my email address? I've used this addy w/ soundcloud for years and received email from them at that address, but some services (Sonos or a service it uses?) will not accept an address with the [plus] in the username prior to the @. Using a [plus] is per standards, but not all systems allow it. Could this be the problem why it won't accept my email and password when trying to add this music service?