is there anyway that they can fix this for us? because like I said, Im a level 45 for 89hours into the game... I would hate to have to restart because of this. What happened to their statement saying "even if one of the characters dies that has a certain quest, their sister or brother will take over the quest for them"? That's not the exact statement, but it was something along those lines.
PC users can resurrect the dead players from the quest line and then reset the quest via the console but far as us xbox users, were pretty well screwed.
far as the quests, 2 dark brotherhood quest cause it to die one main one side quest, joining the storm cloaks and going beyond capturing whiterun cause it to die, same with joining the imperials.
[edit in] on a rare occation doing the viola ring quest before blood on the ice can cause viola to stop coming outside and wandering the streets, though if you go back into her house she's never there.