Web Browser BitmapData Bug?

programming flash
1

I have created an document image viewer in AS2 using CS3 that loads an external jpeg. There’s a “lens tool” that simulates a magnifying lens for easier reading of the document. Here’s an example including the bug:
http://treebuilder.findmypast.com/mediaviewer/mediaviewer.php?DBID=8d07aeb165b45be1cad6642d0bad62d0&MediaID=1869f45810f12eb34c4d29ae7512da28

    import flash.display.BitmapData;
    var origScale:Number = _root.contentContainer._xscale;
    _root.contentContainer._xscale = _root.contentContainer._yscale=100;

    var imageBitmap:BitmapData = new BitmapData(_root.contentContainer._width, _root.contentContainer._height);
    imageBitmap.draw(_root.contentContainer);

    _root.contentContainer._xscale = _root.contentContainer._yscale=origScale;

    var cM_mc:MovieClip = _root.createEmptyMovieClip("contentMagnified", _root.getNextHighestDepth()); 
    cM_mc.attachBitmap(imageBitmap,cM_mc.getNextHighestDepth());

    var MagnifierMask_mc:MovieClip = cM_mc.attachMovie("MagnifierMask", "MagnifierMask_mc", cM_mc.getNextHighestDepth());
    MagnifierMask_mc._x = _root.contentContainer._x+50;
    MagnifierMask_mc._y = _root.contentContainer._y+50;

The user can drag the “lens” around the view to view the magnified content.

The SWF works like a charm in the Flash IDE but when I load it in a web browser, the jpeg loads in normally but the cM_mc clip appears only as a white box with the appropriate dimensions. Any ideas? Thanks!

Examples:


(in Flash CS3 IDE)


(in FireFox w/ Player 9,0,45,0 on XP Pro)