dvr software commissioned?

i was wondering is the software writing commissioned meaning 1 entity writes everyone's software so if a bug happens in the tivo software then the bug shows up in the cable co dvr witch usually is motorola or pace?.



i suspect this since coming from cable co rentals i had bad experience and now i am seeing the same bugs showing in tivo.



does the box download software from the cable co when the cable card is installed explaining some bugs too?