Thanks to this great forum and the Vix image, I've happily upgraded/tweaked my Duo and Ultimo for the last couple of years, but this has me stumped. Upgrading my Ultimo from 2.4 to 3.0.679 renders tuner B unusable, it tunes but it's as though there is a weak signal or bad connection. Tuners A and C work fine. I flashed back to my saved 2.4 backup and all is well, tuner B works fine. So it's not a hardware fault. I've re-flashed Vix3 several times, factory resetted, all to no avail. Has anybody else seen this issue? Thanks for any thoughts.