New Spark release

[f1eng]

Which problem exactly?

The most common problems are outlined in the letter from Devialet quoted by the OP.
A single unit working in mono worked fine for as long as I tried it (not that long) but in stereo Spark doesn't work satisfactorily for me at all really.
Of those that are mentioned the bugs that bother me are:
1. Reasonably frequent Spark crashes (~ 2 per hour causing the music to stop) though it usually re-boots itself.
2. Loss of one of the Phantoms whilst listening, looking at the connections list in Spark shows one of the Phantoms is no longer connected. Which requires the whole system setup to be done again from scratch.
3. Unless the items are hardware reset in the right order the attempt to repeat the setup hangs.

I have given up trying to listen to mine, it is too annoying.
I will try again at Scalford then not bother until after Spark 1.1 is there.
I would have thought some of the problems could be firmware related so hopefully that will be updated too.
I think firmware updates are supposed to be automatic and from the internet but I don't leave mine connected, partly because the Dialog is so hot, partly because it loses a Phantom within a few hours anyway so that, presumably, couldn't be updated automatically anyway.