When I picked up my T-Mobile SGS2 this morning it said there was a version upgrade available, and offered to install it. I did so, and now I have Android 2.3.6, kernel 220.127.116.11, and build GINGERBREAD.UVKL1. After rebooting it popped up a screen asking for my usual address in order to enable WIFI calling. With the battery at 42%. just now I powered it off, then plugged in the charger cable. It immediately booted the phone, so the upgrade did not fix that bug. I haven't seen anything else exciting.