Alpha-Channel Inverted from 6 SR 31 to 7.0?

Hi All. Is it correct that the export of the Alpha-Channel from the RhinoRender FrameBuffer has been “Inverted” from version 6.0 SR 31 to version 7.0 ? - If so: Why? - Is it possible to change the default background-color from black to white when exporting channels in a “flattened” fileformat i.e. JPG’s?
Sorry the PDF-text is in Danish. The top image is from version 6.0 SR 31. The bottom from 7.0 WIP.
AlphaChannel_Page_1+3.pdf (884.9 KB)