I don't believe that the final firmware fix has yet been coded. A firmware patch was applied a while back that was supposed to fix it but reports were still coming in that it actually had not.
You can Google for more. It seems that the manufacturers are being very hush hush about the issue possibly due to pending lawsuits.
Best advice is to steer clear of the 6190 (and other Puma 6 chipset based devices) for now.