I was also thinking from the perspective that the firmware at least looks 98% Sigmatel/Rio (based on playing with the Vibez for 20 minutes at J&R). So, while I'm confident that Sigmatel probably knows every last bit of code in the Vibez firmware, I'm not so confident that Trekstor knows jack.

Maybe a better question is, to whom should we direct firmware update and bug/fix requests so that they actually have a chance of being implemented?