Downloading Transparent PNG's on Android turns the background black

Hi guys,

Can anyone shed any light on why using the Image Factory module to download and store images on Android, does it ignore the transparency on PNG graphics and give them a black background?

It works fine on iOS and everything is "as is".

Do I need to add anything to the download script to retain the transparency?

Help!

Here is my download script:

function getMarker(url, filename) {
 
    // this will enable us to have multiple file sizes per device
    var filename2 = filename.replace(".png", "@2x.png");
    var filename3 = filename.replace(".png", "@3x.png");
 
    var mapMarker = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, 'map_marker_icons', filename);
    var mapMarker2 = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, 'map_marker_icons', filename2);
    var mapMarker3 = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, 'map_marker_icons', filename3);
 
    // now we need to download the map marker and save it into our device 
 
    var getMarker = Titanium.Network.createHTTPClient({
        timeout: 30000
    });
 
    getMarker.onload = function() {
 
        // if the file loads, then write to the filesystem
        if (getMarker.status == 200) {
            // resize the images into non-retina, retina and retina HD and only download and resize what is actyally required
 
                var getOriginal = ImageFactory.imageWithAlpha(this.responseData, {});
 
                var resized2 = ImageFactory.imageAsResized(getOriginal, {
                    width: 50,
                    height: 50
                });
                mapMarker.write(resized2);
                Ti.API.info(filename + " Image resized");
 
 
            //I ALWAYS NULL ANY PROXIES CREATED SO THAT IT CAN BE RELEASED
            mapMarker = null;
        } else {
            Ti.API.info("Image not loaded");
        }
 
        // load the tours in next
        loadNav();
 
 
 
    };
 
    getMarker.onerror = function(e) {
        Ti.API.info('XHR Error ' + e.error);
        //alert('markers data error');
    };
 
    getMarker.ondatastream = function(e) {
        //Ti.API.info('Download progress: ' + e.progress);
    };
 
    // open the client
    getMarker.open('GET', url);
 
    // change the loading message
    MainActInd.message = 'Downloading Markers';
    // show the indicator
    MainActInd.show();
 
    // send the data
    getMarker.send();
 
}