AIR 3.8: BASELINE_EXTENDED failing to initialize on a Nexus 7.

Question

We're using BaseLine extended profile, which works fine on iPad, iPhone, Desktop and Android Nexus 10.
However when trying to initialize Starling on a Nexus 7, I get the error:
"Context3D is not available! Possible reasons: wrongRenderMode or missing device support"
Digging into Starling, this means Stage3D is throwing "Error #3702: Context3D not available."
Reverting back to BASELINE profile, and the app runs just fine.

Answer 1

I can't seem to edit the post above.
But here's the working script for anyone who wants to "simply" check whether they should pass EXTENDED or not. From testing, iPad 1 is said to require roughly a 100ms delay, I've set to 200 just to be conservative. From my personal testing, 1ms was enough (Nexus 7, Nexus 10 and iPad 2)
var delay:int = 200;
var stage3D:Stage3D = Main.stage.stage3Ds[0];
stage3D.addEventListener(flash.events.Event.CONTEXT3D_CREATE, onExtendedComplete);
stage3D.addEventListener(ErrorEvent.ERROR, onExtendedComplete);
try { //Try and request EXTENDED profile.
     stage3D.requestContext3D("auto", Context3DProfile.BASELINE_EXTENDED);
} catch (e:Error) { onExtendedComplete(); }
function onExtendedComplete(event:* = null):void {
     var success:Boolean = (event && !(event is ErrorEvent));
     stage3D.removeEventListener(flash.events.Event.CONTEXT3D_CREATE, onExtendedComplete);
     stage3D.removeEventListener(ErrorEvent.ERROR, onExtendedComplete);
     if(stage3D.context3D){ stage3D.context3D.dispose(false); }
     setTimeout(function(){
          var profile:String = success? Context3DProfile.BASELINE_EXTENDED : Context3DProfile.BASELINE;
          startStarling(profile); //Call your normal startUp routine.
     }, delay);