Comment 4 for bug 947774

I have the same problem.

Login.ubuntu.com shows all my machines are logging in, but in Ubuntu Software Centre the last sync is 2012-11-19, almost a year ago. On new installations, no other machines show.

On older installations where USC used to work, the other machines are shown but the list of applications on my other machines never appears, and the timer logo rotates continually, like it's trying to connect or sync but can't.