[kevincox]

> the only consensus that was reached is a trade-off that left everyone unsatisfied

Yeah, that is sort of what I assumed :(

> other values varied widely from one implementation to another.

IMHO the best solution to this is:

1. Clarify the specification so that future implementations are more likely to be correct.

2. Add a note that only pct=100 and pct=0 are recommended as the other values are inconsistently implemented. I would even rather go as far as calling all other values deprecated than add two new values that mean the exact same thing but will force implementations to support both and open this chicken and egg of you can't really switch to the new one because not everyone will support it. Just say that the pct flag has two possible values 100 and 0.