I upgraded to this 1.2.3 beta, though obviously I should not have. It initially seemed like all was good, did the factory reset afterwards and let it scan the media. Then I touched the volume control and then it like crashed. Now it boots to the ibasso screen and sits there flickering, and it won't boot to the recovery screen either. It's fubar now.
No no, it did the same thing for me, I raised the volume quickly and it just went into a frenzy, rebooted. Then I did a factory reset and it went back to normal. Just do that, follow the same instructions I provided above and you'll be fine.