Oh man, that's going to give Goodnight some serious mental whiplash!
See, I'd totally go with the weave and save that karma, but I'm an old and paranoid soul for all my apparent youth. If my GM says, "Here, do this thing and lose a karma, or don't do this thing and keep the karma" and tells me NOTHING ELSE, I lose the karma on the basis of, "I'm totally being set up for something."
I could be wrong, but I'll cheerfully lose the karma on the long odds that doing so might save my life.