Michael Behe claims that if Lenski's experiment on e-coli produced some novel function, that would disprove ID.
I don't see how it would. Why couldn't the ID proponent just claim that the designer guided the experiment psychically? On theoretical grounds, the ID proponent could claim, "this couldn't have happened with mutation and natural selection. There was an infusion of information from somewhere." How can we rule out the activity of a designer when there are no limits on how this designer operates? Any experiment can be tainted.
It seems to me for ID to be falsifiable, there was to be some type of mechanism/limits for how the designer operates.