If a project is going bad, and you think you know what's wrong, what should you do?
You don't want to get your manager mad at you, but you also don't want the project to go south and lose the work?
Worse still, you could be held legally responsible, under certain circumstances, if a project goes wrong and it's shown that you could have done something about it. This is a matter of individual cases--there is no broad 'duty to warn' as there is in medicine, for example--but if the conditions are right, you could find yourself with a lawsuit.
Have you ever found yourself in this position? How did you handle it?