Thanks for the response. So I add the estimatedBytes prop but I still get the jump back. Really not sure. I ended up just hardcoding it myself. Using a custom progress value rather than the LoaderMax progress.
Just so I'm clear on where that need to go I want to show you the code:
_applicationLoader = new LoaderMax({ onProgress:onProgressHandler, onComplete:masterOnCompleteHandler});
_applicationLoader.append(new SWFLoader("application.swf", {container:contentContainer, name:"Application", onInit:mainSWFInitHandler, estimatedBytes:6625455}));
_applicationLoader.load();
And just to note again: application.swf in turn loads video and sound. Has its includeWithRoot set to true. I've also tried placing "estimatedBytes:6625455" in the LoaderMax params
Thanks