JoeS, I've received the same letter just 3 days ago. I had already had the update applied during my annual maintenance, so I assume they just sent it to everyone, regardless.
As for the update and it's effects, as of right now i'm plugged into a Clipper Creek. I tried operating the Remote while sitting in the car, and it SEEMS to work just fine. I can send multiple commands, basically just push as many buttons as I want, and no scary Yellow
over a car light on the dash.
I'll keep trying it throughout the day, just to get more data points, but so far so good. If only my Wattstation was working so well...