If you're talking about the occasional 30ft height limit warning for no apparent reason that you just move sideways a bit to clear, then no. I got my first one tonight, after loading the new firmware. I didn't notice any new features or behavior differences since the update - although it did include a beacon update as well.
As far as getting warm while sitting, mine does too, and the manual even say normal. As to the overheating issue that seems to be plaguing the facebook group, I haven't seen that yet, but it hasn't been very hot here.