Yes, minor in a technical sense. However, it sends Kerry's "ickiness factor" through the roof. He'll pay for it, because he's already intrinsically unlikeable.
IF this makes it big, then a) Bush's silence on the matter is a huge plus for him; b) the pajamahadeen are going to have scored two incredibly huge victories within a month.
This is cheating.
I you are caught in school cheating during an exam, you will not pass that exam, so why should we be believe Kerry?
Imagine what Americans are going to say if this turns out to be true. If he is cheating here, he will also try to cheat us when at the Big House.