I too notice the annoying "sometimes ignores me" door handle unlocking. Sometimes it does it for no reason at all, and I just have to go to one of the rear door handles to get the car to unlock.
My stereo too did exactly what yours did until I had them update software in various modules, and the problem vanished then and never returned.
Yeah, apparently there is a TSB for the door handles which amounts to "take apart the door handles, clean them out and coat them in something that hopefully will keep the salt/water/etc from getting in there". It's on my list for my mechanic whenever I get down there.
Agh, it was a nightmare getting everything to work so I could update the GPS module to fix that. I suppose I could dig everything out again and try to update other modules as well. I just worry something else is going to decide to crash while I'm trying to do it.