So the electrician was supposed to come out this morning between 8 and 10 am to swap out the charger... 10 minutes after 10, I called SPX and they tracked down the problem. Now, I don't know if I buy this or not, but the story is that the electrician thought the charger was shipping to them, and as they hadn't gotten it, they just didn't do anything. (There's this thing called a telephone?) The charger came directly to me... which is funny because when the original charger was to be put in, they shipped it to the electrician. But the electrician showed up without it and assumed I had it... then they called their office and someone told them it was there... but at least that time they showed up, though they were late the first day due to a scheduling screw up. The guy had an iPhone 4, you'd think they could coordinate better. But what do I know. Anyway, Christie at SPX said they could now come out between 1 and 2 pm today. Not a big deal. These things happen.
I am glad (and keeping my fingers crossed this fixes the problems) that this is going in today though. I've been getting several of the GFCI trips lately. I don't mind it so much if it trips when I first plug it in. It's nastier if it trips later, when it starts to charge. I've never had it trip in the middle of charging though. And never had it not charge after a few plug-out/plug-in cycles.