An overdue update to the original issue. I eventually got tired of trying to fix it, reflashed the box and started over. Since then for almost 4 weeks it worked fine in regard to this (although I have had some short/empty blank recordings), a quick message flashed up to say recording started and if needed it zapped to the recording service. However, despite not changing a single setting lately it started doing it again, or rather not zapping the channel when it should leading to a hung box once again when it needs to use both tuners and I'm watching one. I checked and the setting are as I left them, recording take priority etc. Why does one recording not just fail instead of hanging the box? Have upgraded to 5.1.013 but it has been working under this (til now).