An exception of type 'System.NotImplementedException' occurred in GoogleAds.DLL and wasn't handled before a managed/native boundary
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Runtime.Serialization.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'Anonymously Hosted DynamicMethods Assembly'.
An exception of type 'System.SystemException' occurred in Microsoft.Phone.Interop.ni.dll and wasn't handled before a managed/native boundary
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Xna.Framework.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
An exception of type 'System.SystemException' occurred in Microsoft.Phone.Interop.ni.dll and wasn't handled before a managed/native boundary
An exception of type 'System.SystemException' occurred in Microsoft.Phone.Interop.ni.dll and wasn't handled before a managed/native boundary
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The thread 0x5b0 has exited with code 259 (0x103).
The thread 0xf00 has exited with code 259 (0x103).
The thread 0x854 has exited with code 259 (0x103).
I can confirm this is a bug, it will be fixed with 6.5.12 which I think I will be able to release before next Monday.