OMG, I can't believe this is happening to you again, mountainbiker.
I don't have an answer. Your thoughts about the fuse being too small makes sense. I hope one of the tech guys look in soon for your sake. Or, even anyone with marker lights so they can check their fuse. I don't have marker lights .. yet. Otherwise, your wife may have to go on a scenic drive with you back to the dealer. At least you could use your cruise control this time. I really feel badly for you. You must be feeling livid just about now.