I've read so many rumors, and I'd just like to truly know if this so-called software rev 2.12 really exists for the H/K Signature 2.0. I've got 2.10a, which was supposedly the latest rev when I bought it from Harman Audio last summer. So my questions are: 1) Does it exist? 2) What is improved from 2.10a --> 2.12? 3) Where can I get it? Can I upgrade the ROM myself? I'm hoping maybe it might correct the occasional lockup I get when changing digital modes.