I have just upgraded to TV360 about a month ago, the minute the upgrade completed, the connection via the TV ARC signal ceased and we cannot get sound through the Amp. I don't think any tinkering is necessary as I simply think the new software does not work as well as the old software, and it's clear from the number of complaints that this is a problem area. Are there any known fixes for this issue and/or do we know if Virgin are aware of the problem and that they are working on a fix for it?
In fact I would not recommend that anyone takes the TV360 offering, it has a bad UI (the V6 wasn't great, but this is worse), the tv remote no longer does the slight rewind when you fast forward through programmes to put you where you intended to continue watching (compensating for any reaction time). It's not worth losing any programme history and planned recordings programmes. It really has no advantage over the original V6 given the bugs.
I would love to solve this problem with the Amp, as the experience is sub-par now. I would have liked to have been warned before upgrading about the things that don't work, a bit like the notes you get with new medication! Although I'm annoyed, I would obviously be much less annoyed with fixes for some of these issues!