Nokia Maps updated for Windows Phone 84
It has not been the best of years for mapping apps starting with the release of iOS 6. Apple's new, native Apple Maps got off to a poor start which led to the dismissal of those involved. The problem with Apple Maps was so severe that CEO Tim Cook felt compelled to make a public apology and suggested that iOS 6 users try Nokia Maps as a substitution.
One of the issues repaired was one traced back to the Windows Phone Marketplace that prevented the app from loading. Instead, a "Problem with app" dialogue would open. You can install Nokia Maps from your Windows Phone 8 device by clicking on the sourcelink.
source: WindowsPhoneMarketplace via WPCentral