Scene files contain image files and the image's data is converted to Base64 text so that the image data can be written in the Scene's XML file.  Recently, a scene files failed to load due to non-ascii characters being found in an image's base64 encoded data.  The logic for converting the image data has been changed to use the bytearray's (used for storing the image's bytes) size() method when converting from base64 characters and adding to the scene.