Defrag Tools: #74 - Windows 8.1 - Frame.GetNavigationState Crash

In this episode of Defrag Tools, Andrew Richards, Chad Beeder and Larry Larsen walk you through a common issue in Windows Store applications that use Files. We use a Windows Store 8.1 app sample to show how missing code affects the stability of the process.
Resources:
Understanding and resolving failures in Windows Store apps
Improving apps with Quality reports
Windows 8.1 Application Samples
Defrag Tools SkyDrive (inc. Scripts and ProcDumpExt)
Timeline:
[00:00] - Back in Building 20 - the Millenium Falcon!
[01:00] - Conference Season - TechEd, //build/ and TechReady
[05:09] - FileAccess sample
[06:06] - try .. catch (System.IO.FileNotFound)
[06:55] - StorageFolder.TryGetItemAsync
[10:18] - Understanding and resolving failures in Windows Store apps
[10:42] - Email us your issues at defragtools@microsoft.com
Larry - not sure what's happened to the C9 website but most videos I try to play fail with my browser set to 'Auto'. The progress bar shows 00:00:00 at start and finish and that's about it!! If I select Format /HTML 5 then videos play okay.
I am running IE8 and the latest Chrome on Vista 32bit and have same error on both.
Any ideas? Love the series on Win8 Apps!
@sjypharm:That sounds like a problem with your Silverlight install. Couple thoughts...
All except the 1st put you into HTML 5 playback mode
Thanks Duncanma, I've set my profile to HTML 5 and all is well!