After boasting last week that this has never happened to me, I did actually get it happen a few days ago. Whichever way round it is at 85 volume it just cuts out. A reboot fixed it and it's not happened again since.
Now in hindsight, I was fecking about with IPTVPLAYER just before that happened. Maybe it's something in that, that is causing the problem. All these updates it does on every load.
Has anyone had this happen that DOES NOT have iptv player installed.