"The product shall not ship with any known unresolved severity 1 or severity 2 defects."
Severity 1 is usually defined as crash, data loss, and/or total system unavailability. (In my team, we call this "the big oops".) Severity 2 is usually defined as loss of core functionality of the system.
But when the project's late, those definitions sometimes get changed because, "darnit, we've got to ship!"
And then something like this happens.
Beware changing definitions - there be dragons!