Hi, And this has come up before on the list and here is the answer: http://help.adobe.com/en_US/OSMF/1.0/Dev/WSc6f922f643dd2e6d-5718733812f2bec460d-7fff.html
Basically you need to OSMFSettings.enableStageVideo = false; and it will work - still not sure why the mx one works and the spark one doesn't however. Thanks, Justin
