Today I noticed that I can't install apps from online marketplace (at windowsphone.com), and all other functions on the site are disabled too, like no phone is registered on my Live account. I am using beta 7.8 ROM for Omnia 7 that has been around for some time, if it makes any significance.
I get the following message: "You need to sign in with a Microsoft account on your phone before you can get apps from Windows Phone Store."
Of course, I am logged in with the same Live account that I am using on my phone, as always. Marketplace app on the phone itself is working normally, without problems of any kind.
Maybe that has something to do with using beta ROM (THIS one)? Anybody else having this problem?