I would like to know if the following issue is a bug:

I have a file that contains a background raster image (embedded JPEG) and few vector graphics objects drawn on top of it.

After I save this file as pure SVG (no AI information, so I don't check the Preserve Illustrator Editing Capabilities check box ), I notice a slight degradation of the raster image (for instance, the image border pixels look like being interpolated with the white background). If I save this SVG as an AI file (and no compression), and repeat the Save as SVG, the image degrades even more. So, with each iteration AI -> pure SVG -> AI, the background embedded raster image (JPEG) looks worse and worse.

I use AI CS3 13.0.2.

Thanks,
Matei