Some of you may have noticed a problem with downloading or updating apps this week. Luckily, Microsoft is on the case!
The issue has to do with digital certificates used to sign apps. The problem only seems to affect phones that were upgraded to 7.5 from an earlier version and only a small percentage of new or recently updated apps on the Marketplace are refusing to install or update. It is completely on Microsoft’s side and they’re already working on sending out a fix.
Developers may also notice the app submitting process taking a long time. Microsoft is holding all app certificates until the problem is taken care of.
If you have any of these problems, just be patient and don’t uninstall any important apps until the issue is fixed.