Here's what happened: the rink in Poitiers is being renovated to comply with environmental/safety regulations. This will take about a year. As Joubert was happy with his coaching situation in Poitiers (Veronique Guyon and Patrick Gueppe) he tried to make alternate arrangements in the same area for the period of the renovations. However, this proved difficult due to distances, ice availability and the coaches' employment situation. Eventually a decision was made for Joubert to relocate to Paris and work with Annick Dumont. As others here pointed at the time, Dumont is not an ideal solution for him (or for anyone, for that matter), and indeed Joubert had hoped to continue working with Guyon part-time.

I am not sure at what point things became difficult, but shortly after Joubert skipped French Nats (official reason: the flu), news reports suggested that he was not pleased with Dumont as an only (or even primary?) coach, and that this had been discussed with the federation. At the same time, he was also working on a new LP, possibly due to feedback from the federation. This is the newer version of Gladiator that he's done in the holiday galas the past week or so, though presumably with some modifications.

Joubert is apparently back in Poitiers, commuting... somewhere (Tours? Niort?) and planning to reunite with Guyon. I don't know if the FFSG signed off on this move or whether his training on his own is just for the holidays or a long-term thing (bad idea!). I think Gueppe, with whom he worked last season, is now based in Tours. Basically: I have no idea what exactly Joubert is doing and how much of it is in accord with what his federation wants. It is a mystery. Like most of what he does.