Ellobuddha said...
I have been told up to 50% strength loss.
Get to a tackle shop and buy two sets of split ring pliers. One pair on each "half" of the knot. I just got a real prick of a knot outta mine this way.
Bugger that.... just chew it for ages and soak it in warm water first. It'll come out with no problems.... always good to check your lines before attaching them to the kite.