UPDATE (16 AUG) We fixed the digital certificate problem and last evening resumed publishing new apps. It will take a day or two for the repair to fully deploy and newly-published apps to begin appearing in Marketplace again. If your app was in the process of being published, you don’t need to take any action. We have applied the fix and the app will continue through the certification and publishing workflow as normal.
Since August 3 we’ve been deploying the Windows Phone Dev Center, which includes a completely rebuilt backend infrastructure. In an earlier post, I mentioned the possibility that we might encounter some hiccups during this complex rollout and changeover. Today we did.
This week we discovered an issue with our new digital certificates that’s caused us to temporarily stop publishing new apps. As my colleague Mazhar mentions in his related post, the issue impacts only phones that upgraded to Windows Phone 7.5 from an earlier version of the operating system and only apps published in the last couple of days.
Some customers who try to download a new app may see an error message. If they’re attempting to update an existing app, they might repeatedly be prompted to retry the update. We don’t recommend that people uninstall these apps because they might not be able to download and use them again until we deploy our fix.
We’ve already identified the problem and are working to resolve it and resume certifying and publishing apps as quickly as possible. I apologize for any inconvenience caused by the publishing downtime and will update you when I have more news. We’ve also created a new thread in our MSDN forums for your questions.