and therefor will not download any apps. I've logged into the App Store with my account and have visually verified that all my billing information is correct and present. But, when I try to purchase, say Aperture, I get the usual "You sure you wanna buy this.." message, followed by the "Provide your login and click the Billing button...". When I submit my password and click "Billing", nothing happens. No error. No screen change to the Account Info screen. No recent purchases. Nothing. Anyone have ideas? I did a search for this issue here and on the Mac support site, but didn't see this specific problem. Hopefully, I'm not wasting space with this request. Thanks in advance for any suggestions.