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When the Mono for Android plugin in Visual Studio 2012 tells me there's a new version available and I click 'Download' it throws an UnobserverTaskException.
Created attachment 2463 [details]
Some system info:
Visual Studio Ultimate 2012
Version 11.0.50727.1 RTMREL
Microsoft .NET Framework
OS Name: Microsoft Windows 8 Enterprise
Version: 6.2.9200 Build 9200
Mono for Android: 4.2.4
I have the exact same problem.
Could you please confirm, if you are still getting this error with the latest version of Xamarin.Android?
Please retest with latest 4.7.x Release.
Everything seems to work fine now.